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revision 1.8 by adcroft, Wed Jul 1 22:49:29 1998 UTC revision 1.1069 by mlosch, Thu Feb 19 09:24:23 2009 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o pkg/exf: fix a serious bug in exf_set_uv.F: do a rotation of the
8      interpolated wind field not only for curvilineargrid=.true., but also
9      for a rotated grid (rotateGrid=.true.)
10    o pkg/exf: add capability to bypass interpolation for runoff
11      by setting yet another CPP-flag
12    o autodiff
13      new CPP option ALLOW_TAMC_SINGLEPREC_COMLEV
14      allows to switch to single-prec common blocks;
15      corresponding switch occurs in tamc.h, integer isbyte
16      TAF store directivs "byte" and "kind" seem equivalent;
17      Most tamc.h have been updated correspondingly.
18    
19    checkpoint61i
20    o autodiff:
21      fix autodiff_sore/_restore indices for obcs
22      (spotted by I. Hoteit, M. Mazloff)
23    o pkg/autodiff, pkg/ctrl:
24      Add flag to reduce all tapelev I/O to single-prec.
25      In data.ctrl set
26        doSinglePrecTapelev = .TRUE.
27    o model/src/ini_curvilinear_grid.F: check in hack for SX8 compiler
28      to make sure that recip_dxV and recip_dyU are never zero, until we
29      have a proper exchange for them. Most compilers do not seem
30      to mind divisions by zero in the overlaps, as long as the results are
31      not used anywhere, but sxf90 does.
32    o pkg/shelfice: fix bug with SHELFICEconserve flag, prepare for
33      real fresh water flux (not yet)
34    o pkg/mdsio & rw:
35     - add argument & option to S/R MDS_WRITEVEC_LOC (avoid Open/Close & write-meta)
36     - add simple interface S/R to MDS_WRITEVEC_LOC in pkg/rw: WRITE_GLVEC_RX.
37    o pkg/flt:
38     - replace FLT_INIT by 3-steps standard initialization S/R: readparms,
39       init_fixed & ini_varia.
40     - clean-up & simplify linear interpolation S/R:
41       move flt_bilinear.F -> flt_interp_linear.F ; add arg. myThid.
42     - fix some indices (mainly vertical index) ; add IMPLICIT NONE.
43     - more efficient I/O, using new options of MDS_WRITEVEC_LOC S/R.
44     - add vert. coordinate & horiz. indices to output files.
45     - change vertical position in initial condition, from index to depth [m].
46     - store horizontal (decimal) indices i,j in common block (instead of coord. x,y)
47       (easier to get to a curvilinear grid) ; delX,delY no longer used.
48    o pkg/ggl90: a few modifications:
49     - fix bottom boundary condition, and interpolation of KappaE
50       near top and bottom
51     - use same set of viscosity/diffusivity for TKE/momnetum/tracer
52     - add smoothing option as in Blanke and Delecluse (1993) (--> ALLOW_GGL90_SMOOTH)
53     - add a few options for mixing-length upper limit (--> mxlMaxFlag)  
54    o rename thetaMin,phiMin -> xgOrigin,ygOrigin
55      (maintain temporary backward compatibility, until next checkpoint)
56    
57    checkpoint61h
58    o pkg/diagnostics with "periodic averaging diagnostics":
59      fix S/R DIAGNOSTICS_COUNT ; hack diagnostics_out.F to get NetCDF output.
60    o pkg/my82: add missing "_d 0" ; update output of exp. vermix.my82
61    o pkg/obcs: fix loop ranges for balancing code
62    o pkg/flt:
63     - improve criteria for finding which tile owns a float.
64     - fix FLT_EXCH for case without MPI ; apply cyclic BC + fix also the MPI case.
65    o Add well-mixed CO2 box in aim_v23 (which includes changes in pkg
66      aim_compon_interf, ocn_compon_interf, gchem, and dic to get coupling
67      with ocean biogeo)
68    o pkg/flt:
69     - do some cleaning and fix the restart ;
70     - add output.txt in flt_example/results to get this pkg tested.
71    o genmake2: add an EXTENDED_SRC option and flag.
72       for now, cannot be turned on on command line (only through genmake_local)
73    o pkg/mdsio: read/write vector:
74     - singleCpuIO: fix RL/RS in MDSWRITEVECTOR by calling new S/R MDS_BUFFERtoRL/RS
75     - singleCpuIO=F: fix arrType & filePrec & _BYTESWAPIO in both MDSREADVECTOR
76       & MDSWRITEVECTOR by calling new S/R MDS_RD/WR_VEC_RL/RS.
77     - affects gradient of test-exp "bottom_ctrl_5x5" (not due to _BYTESWAPIO)
78      (drop to 4 digits matching for grad). But this test does not look very
79      reliable (was already failling on eddy, fc5, at 6.digits). Update output.
80    
81    checkpoint61g
82    o pkg/flt:
83      - move FLT_CPPOPTIONS.h to FLT_OPTIONS.h (standard name)
84       + make OPTIONS file more standard.
85      - rename S/R MDSREADVECTOR_FLT to FLT_MDSREADVECTOR (to mach src file name)
86      - fix _BYTESWAPIO CPP-Flag
87      - standard reading of file-parameter "data.flt"
88      - fix argument list of S/R FLT_RESTART
89      still need to fix _BYTESWAPIO in pkg/mdsio/mdsio_writevector.F
90    o pkg/obcs: fix a CPP-flag, bug reported by Jeff Blundell
91    o gather_2d.F/scatter_2d.F: suppress vectorisation on NEC SX in respond to
92      a still unfixed compiler/optimization bug
93    
94    checkpoint61f
95    o pkg/seaice, LSR solver: fix bug in GLOBAL_MAX calls ;
96      update results of global_ocean.cs32x15.icedyn test.
97    o move getcon.F from model/src to pkg/fizhi.
98    o pkg/exf: add parameter for extrapolation of temp up to the surface
99       and option to prevent negative evap (in bulk_largeyeager04 only).
100    o Prather Advection scheme: fix tracer conservation for divergent flow
101      (e.g., when using NonLin Free-Surface).
102    o kpp: retire KPPmld diagnostics --> use MXLDEPTH instead
103    o gmredi (Visbeck-variable-K):
104     - add more parameters to Visbeck-variable-K.
105     - use a 5 points average for dSigmaR in Visbeck-K calculation
106       (more "homogenous": same stencil and same weights as in dSigmaH)
107     - update output of ideal_2D_oce experiment.
108    o fix CPP-flag REAL4_IS_SLOW, when _RS expands into real*4
109      (#undef REAL4_IS_SLOW)
110     - pkg/mnc/mnc_cw_cvars.F: write _RS-grid variable as netcdf-real*4
111       coordinate variable
112     - pkg/monitor/monitor.F: call mon_printstats_rs for _RS variables
113       (surface forcing fields), removes some of the functionality
114     - model/src/write_grid.F: write _RS variables as RS-netcdf variables
115     - model/src/diags_oceanic_surf_flux.F: fix a few diagnostics, but
116       probably not all: copy _RS surface flux fields to RL field before
117       calling DIAGNOSTICS_FILL
118     - model/inc/CPP_EEMACROS.h: make the _EXCH_*_RS macros expand into
119       real*4 (CALL EXCH_*_RS) versions.
120     - tested in 2 experiments: inverted_barometer & solid-body.cs-32x32x1
121       (generate new output).
122    
123    checkpoint61e
124    o gmredi (Visbeck-variable-K):
125      - fix the "OLD_VISBECK_CALC" option + move the #undef to GMREDI_OPTIONS.h
126      - change computation of Visbeck-K where Slope > Smax :        
127        now: N*min(Slope,Smax) (similar to OLD_VISBECK_CALC with gkw91 taperFct)
128        previously was: M*sqrt(min(Slope,Smax)) ; update ideal_2D_oce output.
129    o bottom-drag in P-coord.: change units of bottomDragLinear & bottomDragQuadratic
130      to be the same as with Z-coord. (i.e., m/s & no-units respectively).
131    o calc_viscosity: fix index range (was wrong for CD-Scheme & explicit Visc)
132    o pkg gmredi, linear & fm07 tapering: put an upper limit on Slope^2 so that Kwz
133      does not become too large (to avoid precision problems in implicit-diffusion
134      solver); update ideal_2D_oce output.
135    o pkg ggl90:
136      - in ggl90_cal.F: compute only one set of visc/diff, used to
137        step forward TKE/T/S/momentum
138      - default value of GGL90viscMax/GGL90diffMax larger and equal (to
139        have Prandlt =1)
140    o gmredi (fm07):
141      - add lower limit on Transition layer thickness + lower limit on 1/lambda
142      - allow to set few more params from data.gmredi
143    o pkg ggl90:
144          - add missing sqrt(2) factor in computation of mixing length
145            scale in ggl90_calc.F
146            (see Eq. (2.35) in Blanke and Delecluse, JPO, 1993)
147    
148    checkpoint61d
149    o adjoint modifs
150      - adapt to new field rhoInSitu
151      - allow to revert from StoreDynVars2D, StoreDynVars3D
152        to individual fields
153        (switches AUTODIFF_USE_OLDSTORE_2D, AUTODIFF_USE_OLDSTORE_3D)
154    o store 3-D (in-situ) density in commom block (DYNVARS.h)
155     - save 1 rho computation.
156     - no longer modify T & S inland when using down_slope pkg.
157    o gad_som : allow to switch to SOM advection for T & S without corresponding
158      pickup files (using new S/R: MDS_CHECK4FILE).
159    o keep removing _BEGIN/_END_MASTER between MDSIO S/R call
160      (for useSingleCpuIO to work in multi-threaded)
161    o pkg/shelfice:
162     - disentangle parameters: retire shelfIceFile in data/PARM05 and substitute
163       with SHELFICEtopoFile in data.shelfice
164     - move code for reading ice shelf topography and modifying hFacC into separate
165       subroutines of the shelfice package
166     - separate initialisation of "fixed" and "variable" variables
167     - kTopC is not (yet) replaced by kSurfC, although this is possible
168    o fix broken diagnostic SIatmFW and changed the units from m/s to kg/m^2/s
169    o add initialisation of deepFac if using Pcoords (new S/R set_grid_factors)
170      and rename:
171      ini_phiref.F          --> set_ref_state.F  (+ set anelastic factors)
172      ini_reference_state.F --> load_ref_files.F (- set anelastic factors)
173    o change FIND_RHO_SCALAR : return rho (instead of rho - rhoConst)
174    
175    checkpoint61c
176    o add option ALLOW_ADDFLUID and run-time selector "selectAddFluid"
177      to add mass source/sink of fluid in the interior (3-D generalisation
178      of oceanic real-fresh water flux).
179    o pkg/monitor: fix recip_dr argument in mon_advcflw2 call (-> advcfl_W_hf_max)
180    o vermix test experiment: switch from LINEAR EOS to MDJWF (not tested before)
181    o new pkg: down_slope
182      density-driven downsloping flow parameterisation (Tellus, 1999, 412-430).
183      - presently, modify T & S inland (dwnslp_calc_rho.F).
184        can be avoided if rho was stored in common bloc and used in calc_phi_hyd.
185      - implementation for ocean in P-coords not tested.
186      - add secondary test to global_ocean.90x40x15 (input.dwnslp) to check this pkg.
187    o move kSurfC,kSurfW & kSurfS from SURFACE.h to GRID.h (next to kLowC)
188      (to facilitate conversion of oceanic pkg to p-coordinate).
189    o change FIND_RHO to FIND_RHO_2D :
190      pass arguments tFld & sFld as local (tile) 2D-arrays ; +fix EOS_CHECK.
191    o new pkg: cheapaml
192    
193    checkpoint61b
194    o exch2:
195      change index bounds in rx2_cube exchanges (new S/R: EXCH2_GET_UV_BOUNDS)
196      - no longer depend on the order sequence (N,S,E,W).
197      - 3rd exchange no longer needed (tested with 24 tiles).
198      - same modif to hand-written adjoint S/R (global_ocean.cs32x15: zero diff)
199      - exch_UV_A-grid readily available (but not yet tested).
200      comment out 3rd exch call and remove copy of V to U at SE & NE face-corners
201      (both are no longer needed) in exch_uv: no effect in forward run; but
202       get truncation error differences with adjoint exch.
203    o exch2:
204     - change index-bounds storage (moved from target to local tile,
205       more intuitive this way) ; rename/remove some variables.
206     - change utils/exch2/matlab-topology-generator & code_mods accordingly.
207    
208    checkpoint61a
209    o exch2/matlab-topology-generator:
210      fix bug in index bounds for N-S internal exchange (hard to tell if this
211      had any effect on the solution).
212    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
213      is exceeded
214    o testreport: modify syntax of awk, so that it works also with
215      awk, and not only with nawk and gawk
216    
217    checkpoint61
218    o autodiff
219      Change default for TAF usage by removing argument '-nonew_arg'
220      This changes TAF subroutine argument list (ordering of active var.)
221      Omission of this flag leads to incompatibility w.r.t. TAMC
222      To restore TAMC-compatibility, need following modifs:
223      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
224      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
225      Tested TAF version is 1.9.22
226      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
227    
228    checkpoint60
229    --->>> This is the last checkpoint for which generating the adjoint
230    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
231    --->>> by default.
232    --->>> Future checkpoints will ommit this flag by default.
233    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
234    o pkg/grdchk: Add gradient check to etan0 perturbations.
235    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
236    o pkg/autodiff: more flexibility in zeroadj.
237      model/src: modifying do_oceanic_phys.F accordingly.
238    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
239    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
240      special setup of gmredi for which the adjoint is stable
241      enough for parameter optimization.
242    o bridging the gap between eddy stress and GM.
243      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
244          along with a change in CPP option (now ALLOW_EDDYPSI).
245      -> when using GM w/ GM_AdvForm:
246          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
247          is applied either in the tracer Eq. or in momentum Eq.
248          depending on data.gmredi (intro. GM_InMomAsStress).
249      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
250      The key modifications are in model/src/taueddy_external_forcing.F
251      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
252    
253    checkpoint59r
254    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
255      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
256      fix option to read coriolis(@ cell-corner) from files with CS-grid.
257    o pkg/mnc: add some attributes to standard 1D-coordinate variables
258    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
259      mass points, when using mnc for output
260      - add runtime parameter (missing_value, missing_value_int) to override
261        default (which is the value of getcon('UNDEF'))
262    o pkg/mnc: prepare mnc for the actual use of missing values with the
263      diagnostics package: small fix in mnc_cw_readwrite.template and more
264      initialisation of never used fields
265      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
266      versions
267    o pkg/thsice/thsice_ini_vars.F added default initial values so that
268      thermodynamics sea ice solver does not blow up when some initial fields
269      are missing.
270    o move from external_forcing_surf.F to ini_forcing.F
271      the p-coord. hack consisting in using pLoad to set phi0surf ;
272      update output of tutorial_global_oce_in_p (affected @ truncation level).
273    o Freshen up a bit hs94.1x64x5, notably:
274      remove rotationPeriod and tRef=5*0. (adjoint only), and add
275      exactConserv=.TRUE.
276    o pkg/generic_advdiff:
277      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
278      applies to files where Temperature & Salinity 2nd Order moments are used.
279    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
280      this uses a dynamically allocated internal state data structure
281      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
282      and requires a fortran 90 compiler
283    
284    checkpoint59q
285    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
286       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
287    o Refresh tutorial_global_oce_biogeo, notably:
288      - change bathymetry (put back seamounts in ACC, use hFacs)
289      - change EOS (POLY3 --> JMD95Z)
290      - use Bryan-Lewis vertical diffusivity
291      - use multidimensional advection
292      - remove old virtual virtual in dic pkg, now done through ptracer pkg
293      - change a couple of parameters in dic pkg
294    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
295    o pkg/obcs: change default to OBCSfixTopo = .true.,
296      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
297      - replace "debugMode" with "debugLevel .GE. debLevB"
298    o implementation of TAF directives for gchem,cfc,dic
299    o remove "exp5" (replaced by tutorial_deep_convection).
300    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
301      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
302      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
303      --> changes results in exp4, seaice_obcs
304    o tutorial_deep_convection :
305      update the set-up and increase resolution and domain size ; start
306      from pseudo initial conditions = output at t=120mn in order to see
307      something happening when running testreport.
308    o pkg/seaice: add os7mp as an advection scheme
309                  add check for advection schemes
310                  add a flag for restoring T and S underneath sea ice
311    o pkg/my82: add netcdf-support and diagnostics
312    o thsice pkg:
313      - Now hsMax limits snow height by turning it into ice following
314        flooding scheme (and now conserving energy)
315      - Slight rewriting of the formula in thsice_calc_thick.F
316      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
317      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
318    
319    checkpoint59p
320    o gchem / dic / cfc :
321      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
322      - add new parameter files: "data.dic" & "data.cfc" ;
323      - various re-arrangement in initialisation & header file ;
324      - fix tutorial_global_oce_biogeo for multi-threaded test.
325    o pkg/dic: test for "pickup_dic" file when restarting ;
326      if no pickup-file, can restart with a re-initialised pH (same as it did
327      before) providing pickupStrictlyMatch is set to False.
328    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
329      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
330    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
331      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
332    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
333     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
334       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
335    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
336       scheme to use for vorticty-term ;
337     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
338       (with default selectVortScheme, return to original discretisation)
339     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
340    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
341    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
342      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
343      also fix diagnostics VISCAHW & VISCA4W.
344    
345    checkpoint59o
346    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
347    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
348      move a few statemens out the main loop into separate loops
349    o pkg/shelfice:
350      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
351        (kg/m^2/s), does not break tests, because in verification/isomip,
352        rhoConstFresh=rhoConst (by accident)
353      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
354      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
355        new file model/src/seawater.F, so that they are available for all pkgs.
356      - convert potential temperature into in-situ temperature. This changes the
357        isomip tests => update tests
358    o add a flag writePickupAtEnd (default=true) to be able to suppress
359      writing a pickup at the last timestep
360    o tools/mpack-1.6 :
361      - disable automake (not working) and autoconf (not needed).
362      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
363        also cleaner with much less compilation warnings.
364    o pkg/profiles:
365      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
366      (for "less than 32 characters name" compiler requirement)
367    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
368      conditions that have a different sampling frequency than S/T/U/V obcs
369    o pkg/diagnostics (stats-diags):
370      - fix global Min/Max in case 1 processor get only empty tiles
371    o genmake2: replace (4 times)
372         make genmake_tc_1.o >> genmake_warnings 2>&1
373      with
374         COMM="$CC $CFLAGS -c genmake_tc_1.c"
375         echo $COMM >> genmake_warnings
376         $COMM >> genmake_warnings 2>&1
377      to make genmake2 always see the value of CC as specified in the optfile.
378    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
379      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
380      - modify verification advect_cs test to test SOM-advection on CS-grid.
381    o pkg/ctrl:
382      - Rewrite of ctrl_map_ini_ecco.F,
383        introducing a generic routine (ctrl_map_ini_gen.F).
384      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
385    
386    checkpoint59n
387    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
388      number in dedicate array "hdiag":
389      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
390        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
391      - many small changes (integer format) for large number of diagnostics
392      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
393        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
394    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
395      usingSphericalGrid, this allows to define the rotated grid coordinates
396      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
397      geographical coordinates according to the inverse of the rotation defined
398      by the Euler angles, so that Coriolis parameter and online-interpolation by
399      exf works with the geographical coordinates on XC/YC/XG/YG.
400      Naturally, this feature does not work with all packages, so some
401      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
402      profiles), because there the coordinates are assumed to be regular
403      spherical grid coordinates.
404    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
405      - introduce isopycnal diffusion coefficient control.
406    o tools/adjoint_options:
407      - additional control vector components.
408    o pkg/mnc: have mnc create marginally meaning full coordinate variables
409      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
410    o pkg/mypackage:
411      - add example of read/write pickup for state-var ;
412      - add entry points to the main code for state-vars diags & write-pickup.
413    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
414      transitions for useExfYearlyFields
415      - add new subroutine that determines the file to read from for
416        use*YearlyFields = .TRUE. and .FALSE.
417      - add a verification experiment to global_with_exf that tests
418        useExfYearlyFields with USE_EXF_INTERPOLATION defined
419    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
420      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
421      subroutines (which could be generated from a template, because they are
422      almost identical), for now they are included in obcs_prescribe_read.F for
423      simplicity
424    o pkg/exf:
425      - add a little more diagnostic to exf_interp_read (in analogy to
426        mds_read_field, can be turned off with debugLevel < debugLevA=1)
427      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
428        ugly but fast by unrolling short inner loops, inserting a unroll=8
429        directive in routine lagran, and splitting a loop and making do while the
430        outermost loop (the latter requires the intoduction of index arrays)
431    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
432    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
433      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
434    o verification/seaice_obcs: updated for restart test and latest options
435    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
436      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
437      for now this is only available for the C-grid code and also within
438      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
439    
440    checkpoint59m
441    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
442      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
443    o gad_som : fix flux output (& diagnostics) to have same units as other  
444      advection scheme fluxes (was previously multiplied by deltaT).  
445    o added verification/seaice_obcs both to test seaice open boundaries
446      and to provide an example matlab scrpt for generating them
447    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
448    o pkg/salt_plume: clean up salt_plume_frac.F to
449      remove redundancy in PlumeMethod 1 and 4
450    o pkg/kpp: added saltplume diagnostics
451    o pkg/obcs and pkg/seaice:
452      - do not set uice and vice to zero when OB*icefile are unspecified
453      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
454      - moved seaice tracer obcs after call to seaice_growth
455    o pkg/salt_plume: added various options for salt plume depth
456      criterion and for vertical distribution of the salt
457    
458    checkpoint59l
459    o pkg/ptracers: new version of ptracers pickup:
460      read meta file and write only fields which are needed to restart.
461      ( same logic as main pickup file ; also using pickupStrictlyMatch )
462    o pkg/seaice:
463      - add timescale for melting due to warm mixed layer as a means of
464        setting SEAICE_availHeatFrac more conveniently
465      - add a CPP-flag/runtime parameter check for flooding algorithm
466      - reformulated availHeat in seaice_growth.F to be independent of AREA
467    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
468      unit changes
469    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
470    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
471      SX vector computer.
472    o pkg/seaice:
473      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
474        seaice forcing fields can now be read only through pkg/exf
475      - removed some unused halos
476    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
477    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
478      or U/VICE from U/VWIND before computing U/VSTRESS
479    
480    checkpoint59k
481    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
482      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
483    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
484      all experiments pass when compile with un-initialised var. checking option.
485    o added pkg/salt_plume
486    o script to test restart (for now, in MITgcm_contrib/jmc_script)
487    o pkg/seaice: new read/write pickup version.
488      read meta file and write only fields which are needed to restart.
489      ( same logic as main pickup file ; also using pickupStrictlyMatch )
490    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
491    o lab_sea.hb87: modify the domain & update output.hb87.txt :
492      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
493      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
494      process. Fixed here by closing the domain at the Northern boundary.
495    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
496    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
497      a set of consecutive levels in/from a 3-D array.
498    o pkg/ptracers:
499      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
500      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
501    
502    checkpoint59j
503    o in pkgs: dic, obcs, offline, rbcs:
504      standard way to compute coeff. for time interpolation between 2 time reccords
505      which retains full precision (& make results less dependent on compiler).
506      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
507    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
508      packages instead of reading ice cover and wind speed separately
509    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
510     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
511      to allow to compile customized code before the update)
512    o cleaning-up:
513      - fix CPP instruction syntax in pkg/obcs
514      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
515        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
516      - fix some threads issue in IO parts.
517    o pkg/dic:
518      - add tons of "_d 0" (--> much better testreports !)
519       and then update outputs of tutorial_global_oce_biogeo
520    o pkg/mom_fluxform:
521      add a special version of momentum advection intended to conserve momentum
522      next to a bathymetry step or a coastline edge. (default = off = #undef)
523    o new read/write pickup version:
524      - for now, only implemented for main (mdsio) pickup file.
525      - write out only what is needed to restart; merge pickup_nh , pickup_ph
526        and main pickup together.
527      - read meta file; read only what is needed to restart; stop if a field
528        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
529        if it make sense (even if the restart is not perfect).
530      - if no meta file, assume that pickup to read corresponds exactly to
531        a pickup that would currently be written.
532      - read pickup written in the old format (until checkpoint59i) if it
533        recognizes an old meta file (no field-list).
534      - add a meta file in exp. which starts from a pickup: 2 cases:
535        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
536         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
537        b) a meta file describing the content of the associated pickup file
538         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
539    o pkg/mdsio & pkg/rw:
540      - new routine to read a meta file ; new set of routine to read
541        Multiple-fields file (with meta file).
542    o added open boundary conditions capability for seaice
543        HSNOW, HSALT, UICE, and VICE
544    
545    checkpoint59i
546    o adjoint:
547      * fix multiDimAdvection adjoint
548        (partial recomputation problem by TAF for fVerT(:,:,kDown)
549        and comlev1 size definition (maxpass vs. max. number of tracers)
550      * verification/global_ocean.90x45x15 adjoint now tests
551        NLFS and multiDimAdvection using DST3 (=30)
552      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
553    o pkg/kpp: add "_d 0" to real constant (if missing);
554      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
555      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
556    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
557      for internal parameters related to restart process (formerly from PARAMS.h)
558      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
559    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
560      as argument. (only atm2d & obcs write_pickup have not yet been updated)
561    o pkg/monitor:
562      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
563      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
564      - account for deep Atmosphere factor and density factor (anelastic)
565    o added open boundary conditions capability for seaice HEFF and AREA
566    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
567      thermodynamics
568      - requires a little reorganization, which affects the testreport results
569        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
570        so that now the conservative form is tested
571      - add a few comments
572    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
573    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
574    o add new diagnostics to seaice: advective, diffusive fluxes (only for
575      multidim-advection, for scheme 2 they are not filled) and transports,
576      thermodynamic growth rates
577    o change units of EmPmR (inside the code, + within coupling interface)
578      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
579      Affects results @ truncation level (cg2d match) and update output of
580       experiments: lab_sea(6), global_ocean.90x40x15(10),
581      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
582      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
583      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
584      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
585    
586    checkpoint59h
587    o pkg/exf:
588      - improve vectorization by moving if-statement out of loops in
589        exf_mapfields, exf_radiation
590      - exf_bulkformulae.F: introduce 2D fields and vectorize code
591    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
592    o testreport:
593      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
594        monitor & update offline_exf_seaice exp. output.
595      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
596    o pkg/seaice:
597      - bug fix in the evp solver: boundary conditions were affected be
598        masking of zMax/zMin (changes results)
599      - minor bug fix in boundary conditions in seaice_calc_strainrates
600        (changes results for no_slip)
601      - seaice_lsr.F: make interpolation of eta dependent on boundaries
602      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
603      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
604        stress formulation and no-slip boundary conditions
605    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
606      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
607    o pkg/seaice: a first HSALT time stepping equation has been checked in
608    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
609      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
610      without requiring DO-IF statements
611    o pkg/thsice:
612      use continuous power-law function for partition of energy between lateral
613      melting/freezing and thinning/thickening ; old code using step function
614      still available with #undef THSICE_FRACEN_POWERLAW
615      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
616    o testreport: change AD testing : check against results/output_adm.txt
617      using same scripts as for forward test.
618    
619    checkpoint59g
620    o adjoint testing: in preparation for changing testreport:
621      - output format: cost and grad written on separated lines
622      - ad output results in directory "results" (instead of "results_ad")
623    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
624    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
625    o pkg/ecco: allow user defined cost function contributions
626    o testreport:
627      Allow to choose (per experiment) the list of tested output variables
628       and the main variable (used to issue a pass/FAIL ) ;
629      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
630      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
631      Also modify printing of summary:
632       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
633       b) echo the list of tested variables in the individual summary.txt of
634          each experiment.
635    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
636      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
637      (but still depend on the tile decompostion of the domain).
638    o pkg/seaice: change a discretization detail to make the B-grid code
639      "more symmetric". This change is likely to remove all "ridges/leads" that
640      where quasi-aligned with the grid in B-grid solutions. It may also be
641      the solution to the stress coupling issues with the B-grid.
642    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
643      remove .cvsignore from input dir. (since testreport no longer run here).
644    o pkg/thsice:
645     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
646     - fix reshaping of sea-ice just after advection:
647       melt all the ice only if ice-volume is too small.
648     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
649       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
650     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
651    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
652      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
653    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
654      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
655      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
656      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
657      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
658      -> update output.txt
659    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
660     this affects truncation error: -> update output.txt of exp:
661      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
662      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
663    
664    checkpoint59f
665    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
666    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
667      a bounded range (in forward mode)
668    o pkg/ecco, ctrl, autodiff and mom_common:
669     internal parameter controls, completements of implementations
670    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
671    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
672      (not seem any difference in testing results).
673    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
674       at face corners.
675    o pkg/generic_advdiff:
676     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
677      loop range indices for computing vertical advection tendency
678      and do the calculation in the interior only (no overlap) ;
679      for now, only implemented for SOM advection (to save CPU time).
680     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
681    o exch2 adjoint
682      First set of changes:
683      - add exch2 hand-written adjoint templates
684      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
685        This will require cleanup in pkg/autodiff/*.F
686        (changed routines currently kept separate in verif. code/)
687      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
688        that used to hide exch2 or cubed-sphere specific code
689        (commented via 'cph-exch2')
690    o pkg/seaice
691      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
692    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
693       output of global_ocean.cs32x15.thsice .
694    
695    checkpoint59e
696    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
697      for B-grid vector (not yet tested) and C-grid vector (<- only used
698      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
699    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
700      (#ifdef ALLOW_SALT_PLUME)
701    o gather_2d/scatter_2d: removed halo regions
702    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
703      scheme and the corresponding test case (under front_relax dir). For now,
704      only available with Skew-flux form and not yet tested in realistic set-up.
705      adjoint: store directives updated, but gradient checks deteriorated,
706      so maybe GM/Redi adjoint is now broken.
707    o seaice adjoint
708      * add AREA, HEFF, HSNOW as control variable
709        (should not change lab_sea results)
710      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
711    o pkg/seaice:
712      * added computation of saltFlux in seaice_growth;
713        For time being, sea ice salinity is assumed constant
714        contribution of snow flooding to freshening of sea ice is neglected.
715        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
716        defaults to 0.0 in order to maintain backward compatibility.
717        Typical values for SEAICE_salinity are 4 to 10 g/kg.
718      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
719      * added SEAICE_availHeatFrac, which specifies fraction of surface level
720        heat content used to melt or grow ice
721      * commented out cap of HICE: it helps keep ice thinner
722      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
723      * applied OBCS T/S mask to HEFFM sea ice mask
724    
725    checkpoint59d
726    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
727     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
728     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
729    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
730     and change default value of parameter "GM_Small_Number";
731     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
732       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
733       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
734    o pkg/ecco: cost function when applying pkg/smooth to controls
735    o pkg/ctrl: add forcingPrecond run time parameter
736    o pkg/seaice:
737     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
738     - fix bug in metric terms of u-equation in LSR solver (implicit part),
739       changes verification/lab_sea
740     - rearrange implicit part of u-equation in LSR solver to make it easier to
741       read, understand, and debug. This causes changes at the truncation level.
742     - fix (serious) bug in the boundary conditions (sign error in the implicit
743       part) of the LSR solver. Changes all LSR results.
744     - fixed problem with HSNOW initialization to avoid thick snow when AREA
745       is initilized with small values - does not change lab_sea results.
746     - added HsnowFile initialization capability
747    o pkg/smooth: addition to model/src and pkg/ctrl so allow
748     initialization of pkg/smooth and application to control vector
749    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
750    o dependencies: pkg/profiles requires pkg/cal
751    o pkg/profiles:
752     - added option ALLOW_PROFILES_GENERICGRID
753         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
754         that interpolation information (grid points and coefficients) is provided
755         within the netcdf input files.
756         -> sample matlab scripts can be found in MITgcm_contrib/gael
757         that allow you to prepare netcdf input files.
758     - also modified: cleaner include statements, cleaner error print statements,
759       cleaner stops when error, and more tests of the netcdf input files consistency.
760    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
761    o pkg/seaice:
762     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
763       requires a new routine: seaice_diagnostics_fill.F
764     - make sure that seaice does not move if not forced (pressure replacement
765       method, Hibler and Ip, 1995), changes results
766     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
767     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
768       It is turned off by default (=-1.), because it changes the results.
769     - make it possible to read AREA from a file, too.
770    
771    checkpoint59c
772    o add S/R and diagnostics for oceanic mixed-layer depth
773    o move GMRedi call after all vertical mixing schemes (including KPP)
774    o pkg/thsice:
775     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
776      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
777    o pkg/obcs:
778     - bug fix for balance code
779    o pkg/seaice:
780      - allow values of SEAICE_elasticParm > 1
781      - add new parameter SEAICE_evpTauRelax as an alternative
782        to SEAICE_elasticParm
783      - make lsr boundary conditions free slip (by default), changes result
784      - add code for no slip boundary conditions for lsr
785      - set minimum of zeta to zero (and not 4e8) (changes results)
786      - add a cap on AREA after advecting AREA if seaice_growth is not called
787    o change calculation of Visbeck K:
788      - no longer depend on tapering scheme; instead, compute slope (limited
789        by GM_maxSlope). this is equivalent to what was comuted before with
790        clipping or linear tappering.
791      - fix vertical averaging (wrong by 1/2 level)
792      - leave the old version (but will not be maintained) within
793        #ifdef OLD_VISBECK_CALC / #endif
794      - update output of exp. ideal_2D_oce
795    o change error catch in calc_r_star to improve vectorization
796    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
797      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
798    o adjoint:
799      Re-organized adjoint checkpointing according to Matt Mazloff
800      (but with modifs/completions/cleanups)
801      Storing is now bundled into large arrays to optimized I/O
802      (and second step in cleanup of the_main_loop)
803    
804    checkpoint59b
805    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
806      - export/import (between ocean & coupler) fields needed for ocean DIC.
807    o pkg/seaice:
808      - get rid of three more exchanges seaice_calc_viscosities (required
809        different loop boundaries in seaice_lsr and seaice_ocean_stress)
810      - bug fix in seaice_ocean_stress (update of lab_sea required)
811      - reduce loop boundaries to necessary minimum also in seaice_evp
812      - go back to the old way of computing deltaC/Z as the adjoint likes that
813        better
814    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
815      passive tracer to an Age Tracer) + update output.txt
816    o pkg/exf:
817      - implement A-grid / C-grid selection for wind-stress input files.
818      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
819      for now, in exf_bulk_largeyeager04.F only :
820      - change implementation for case where windspeed + 2. components wind-stress
821        are read-in. AND use rhoConstFresh to convert evap.
822    o pkg/seaice:
823      - use correct EXCH_UV for wind-forcing (on A-grid).
824      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
825        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
826    o pkg/exf:
827      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
828      EXF_INTERPOLATION:
829      - merge global_with_exf/code version of exf_interp_read.F
830        to the main code ;
831      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
832        reading the file ; Important: This options needs to be defined to recover
833        previous code.
834        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
835      - no longer loose real*8 precision along the way when using exf_iprec=64.
836    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
837      - change discretisation of evp-solver in order to avoid another exchange
838        (changes lab_sea) and clean up a little
839      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
840        help the adjoint (this also changes the results slightly)
841      - add a few "_d 0" where they had been missing in seaice_evp.F
842      - cleaning up: remove unused seaice_calc_rhs.F
843    o pkg/exf: some cleaning-up:
844      - change various "constants" into runtime parameters
845      - cleaned-up Large&Yeager04 routine which should eventually
846        replace exf_bulkformulae.F (changed names of S/R and CPP)
847        and merged various ALLOW_ATM_WIND options
848     only used with thsice pkg (in thsice_get_exf.F):
849      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
850        which are used when useStabilityFct_overIce=TRUE (= the default)
851      - change default values of ice & snow emissivity and scale downward LW
852        by ice & snow emissivity.
853    o pkg/thsice:
854     fix few little problems, in thsice_calc_thickn.F:
855      - growth vertically (and not laterally) if iceFrac == iceMaskMax
856      - melt only laterally if hIce < hThinIce (as the comments say)
857      and in thsice_extend.F:
858      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
859      - start to form ice as soon as the minimum ice-volume is reachable.
860     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
861      and cpl_aim+ocn
862    o pkg/kpp
863     - move computation of surface related input fields to KPP into a new
864       subroutine kpp_forcing_surf.F
865     - remove wrong (within bi,bj loops) EXCH calls.
866     - little cleaning (add argument myThid in last position, cvs header ...)
867     - for now, fix conservation problem by exchanging KPPviscAz (may not
868       be the best fix)
869    o pkg/seaice
870     - check for inconsistent evp parameter/cpp-flag combination
871     - remove leftover errIO flat for obsolete name list error handling
872    o OpenAD
873     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
874    
875    checkpoint59a
876    o pkg/seaice: some parameter clarifications and a little bit of clean up
877    o pkg/thsice: rename run-time parameters:
878       himin       -> hIceMin
879       himin0      -> hThinIce
880       hihig       -> hThickIce
881       i0          -> i0swFrac
882       transCoef   -> bMeltCoef
883       frac_energy -> fracMelting
884      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
885       with default values (for now) that do not change the results.
886      remove old version of thsice vars advection in pkg/seaice.
887    o in FFIELDS.h:
888      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
889      - make pLoad & sIceLoad always available (but still only used if
890         ATMOSPHERIC_LOADING is #define).
891    o pkg/kpp: replaced _KPP_RL with _RL
892    o bug fixes for vertical diffusivity computations when both KPP and
893        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
894        are no longer updating the vertical diffusivity array
895        (passed as argument) but are (re-) setting those arrays.
896    o pkg/seaice: fix bug in evp solver, while doing that
897      - change (improve?) discretization of stress computations for both
898        cgrid-lsr and evp solver
899      - add a new routine to compute strain rates
900      - the above changes lab_sea results
901      - add no slip conditions for evp solver (off by default), lsr-version
902        may follow
903      - fix exchange for shear at Z-points (does not change lab_sea)
904      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
905        (to force the user to pick a time step since there is not "safe" way
906        of choosing it)
907      - add principal stress diagnostics
908      - rearrange fields for evp a little to avoid having to call a: too many
909        exchanges and b: exchanges for stress trensor components which we do
910        not have.
911      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
912        of evp, complete rewrite for lsr case (latter is does not yet work
913        in all cases)
914    o pkg/kpp: add code to have mixing in shelf ice caverns
915      - add myThid to all kpp routines (long overdue)
916    
917    checkpoint59
918    o pkg/exf:
919      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
920        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
921      - move exf header files from lower_case.h to UPPER_CASE.h ;
922        add missing cvs Header & Name
923      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
924      - add namelist param. selectStressGridPosition, exf_monFreq
925      - retire many _CLIM routines, and remove data.exf_clim
926        + params moved to data.exf
927        + climsst, climsss now handled by exf_set_gen, i.e.
928          climss?period=0 refers to constant field,
929          climss?period=-12 to monthly forcing
930      - split up namelists in data.exf
931    o pkg/seaice:
932      - remove seaice_exch and seaice_exch_uv
933      - remove superfluous exchange of theta
934      - add myThid to seaice_budget_ocean/ice
935      - add new interface for atmospheric wind forcing (C-grid only)
936        + new routine
937        + two new field (taux, tauy for stress over ice)
938        + removed one global field (DAIRN) for C-grid case only
939    o pkg/thsise
940      - 2nd set of modifs for thsice adjoint in conjunction with exf
941    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
942    
943    checkpoint58y_post
944    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
945      vertical diffusivity, similar to that in MOM4; turned on using
946      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
947      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
948    o Added capability for 3D specification of background vertical diffusion
949      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
950      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
951      "data" file that contains the 3D vertical diffusivity coefficients.
952    o ice dynamics (pkg/seaice) with thsice thermodynamics:
953      - add code within pkg thsice to advect & diffuse sea-ice fields
954      similar to (and will replace) what has been added in  seaice_advdiff.F,
955      but: - conserving Mass, Heat & Salt.
956           - better when using non-linear advection scheme (not yet fully tested)
957           - can also be used in atmospheric set-up (for now, only the diffusion).
958    
959    checkpoint58x_post
960    o IO option for global-file compact format:
961      - add options when generating topology (utils/exch2/matlab-topology-generator)
962      - add I/O capability (pkg/mdsio).
963      - adapt utils/matlab/rdmds.m to read this format.
964      for now long-line format not yet supported by pkg/mdsio (& exch2).
965    o shelfice: add a few diagnostics
966    
967    checkpoint58w_post
968    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
969      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
970      (and replace horiVertRatio in NH code).
971      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
972                         and tutorial_plume_on_slope (sensitive to truncation)
973    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
974      directly to drive seaice model (C-grid only)
975    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
976     - reintroduce computation of wind from stress,
977     - compute tau (in exf_bulkformulae.F) from windstress averaged to
978       mass points to avoid tau = 0
979     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
980    o rdmnc.m: make it work with "global" files created with gluemnc
981    o rdmnc.m : some improvements in dealing with singleton dimension
982      (tested on all testreport mnc output files).
983    o genmake2: disable pkg/profiles if netcdf test fails.
984    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
985    o move call to cal_readparms up to make calendar parameters/variable available
986      to all packages
987    
988    checkpoint58v_post
989    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
990      useDynP_inEos_Zc tested.
991    o pkg/exf: changes to properly interpolate/mask/scale initial fields
992    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
993      and portions thereof.  See read_cs.txt for description and examples.
994    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
995      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
996      following the great-circle arc between those 2 points.
997    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
998      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
999    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
1000     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
1001     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
1002     - still needs work (not working with some options ; efficiency to improve)
1003       and serious testing.
1004     - use this scheme for temperature & salinity in 2 advection test exp.:
1005       advect_xy & advect_xz, respectively.
1006    
1007    checkpoint58u_post
1008    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
1009    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
1010    o testreport: add option "-skipdir" to skip some test.
1011    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
1012      momentum calculation.
1013    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
1014    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
1015      remove checkpoint.F and the_correction_step.F (no longer used);
1016      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
1017    o add option (linFSConserveTr) to correct for tracer source/sink due to
1018      Linear Free surface
1019    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
1020    o pkg/thsice: fix reading mnc-pickups
1021    
1022    checkpoint58t_post
1023    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
1024    o pkg/mdsio:
1025     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
1026       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
1027       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
1028     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
1029     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
1030       either MDS_READ_FIELD or MDS_WRITE_FIELD )
1031     - new S/R (to replace MDSWRITEMETA), which allows to write more
1032       informations (variable names, time ...) to meta files.
1033     - modify rdmds.m to give back the meta file content.
1034    o pkg/diagnostics: change vertical interpolation to be safer, and more
1035       flexible (define p-levels to interpolate to in data.diagnostics);
1036      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
1037       diagnostic pointer.
1038    o pkg/seaice: more cleaning up of seaice_growth, added many comments
1039    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
1040    o fix multi-category seaice:
1041     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
1042       SEAICE_MULTICATEGORY
1043     - fix short wave heat flux
1044    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
1045       and allow to use EVP solver. Change forward lab_sea: test both EVP
1046       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
1047    o Initial check-in of lab_sea adjoint
1048      (very similar to natl_box_adjoint/code_seaice)
1049      * used C-grid and EVP solver
1050      * used KPP, GM/Redi
1051      * uses inAdExact=.TRUE.
1052      * gradient checks fail for both ADM and TLM
1053        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
1054        f.d. gradients actually seem more problematic than ADM, TLM gradients;
1055        issue is related to forward mismatch between g77 an ifort
1056    o pkg/seaice: overhaul of thermodynamics
1057     - growth.F and groatb.F are replaced by new routine seaice_growth.F
1058     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
1059     - move a few global fields out of SEAICE.h into seaice_growth.F and
1060       make them 2D (FICE/QNETO/ ...)
1061     - remove FO (it is the same as QNETO)
1062     - introduce a few local fields to avoid modifying external fields such
1063       as atemp, etc.
1064    
1065    checkpoint58s_post
1066    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
1067      changed exf_set_gen.F so that
1068        genperiod=0 means input file is one time-constant field and
1069        genperiod=-12 means input file contains 12 monthly means
1070    o CG2D: use pre-computed solver main-diagonal (stored in common block);
1071      this affects truncation error ; generate new output file for exp. which
1072      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
1073        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
1074        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
1075        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
1076        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
1077        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
1078    o start implementation of deep-atmosphere and anelastic formulation
1079    o verification: remove 2nd copy of input files and use script "prepare_run"
1080      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
1081    o mom_common/vecinv/fluxform: fix a few initialisation isssues
1082    o profiles: fix for multithreaded case
1083    
1084    o diagnostics: rename few diags:
1085      s/'PRESSURE'/'RCENTER '/g
1086      s/'TICE    '/'oceFreez'/g
1087      s/'TAUX    '/'oceTAUX '/g
1088      s/'TAUY    '/'oceTAUY '/g
1089      s/'SWFLUX  '/'oceQsw  '/g
1090      s/DIFx/DFxE/g
1091      s/DIFy/DFyE/g
1092      and add few ocean-forcing diagnostics:
1093      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
1094    o modifications to pkg/seaice/growth.F and budget.F, which change results of
1095      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
1096      as actual snow thickness.  It now refers everywhere to effective snow
1097      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
1098    
1099    checkpoint58r_post
1100    o modifications to pkg/seaice/growth.F, which change results of
1101      lab_sea experiment: fixes pertain to melting snow over open water, to
1102      masking EVAP under sea ice, and to using the correct AREA variable for
1103      computations of EVAP, PRECIP, HSNOW, and GHEFF
1104    o add ability to read bathy, salt, and theta using MNC (off by def)
1105    o add flooding algorithm and advection of HSNOW for pkg/seaice;
1106      both are turned off by default and do no change any results
1107    o seaice advection with pkg/thsice: a step toward the use of non-linear
1108      advection scheme, but #ifdef or commented out for now (requires more EXCH).
1109    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
1110      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
1111      in natl_box (affects results @ truncation level: update output.txt)
1112    o multi-threading and IO:
1113      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
1114      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
1115        (needed to work with SingleCpuIO): tested in all verif. exp.
1116    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
1117      affects the results (but none of the verification test uses this scheme).
1118    o Adding some pkg/diagnostics capability to pkg/seaice
1119      (will certainly be subject to changes)
1120    o ctrl: adding new control variables:
1121      lwflux, lwdown, evap, snowprecip, apressure, runoff
1122    
1123    checkpoint58q_post
1124    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
1125      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
1126      high_res_cube configuration by 4% on Columbia.
1127    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
1128      add (in global_with_exf/code) a version of EXF_INTERP_READ without
1129      dynamical allocation (seems to work in multi-threaded).
1130    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
1131      single CPU io) so that TAF does not have to see EESUPPORT.h
1132    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
1133    
1134    checkpoint58p_post
1135    o obcs: stop if obcs is used with useCDscheme = .true.
1136    o shelfice:
1137     - fix a sign error so that no slip at shelfice interface works
1138     - remove stop for combination non-hydrostatic code and shelfice. That does
1139       not mean, that the results are correct, but at least they are numerically
1140       stable
1141    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
1142    o added adjoint exch routined for all exch*3d* routines
1143      and updated flow directives
1144    
1145    checkpoint58o_post
1146    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
1147      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
1148    o change controling S/R for writing pickup file (new S/R do_write_pickup)
1149      and clean-up reading/writing of pickup files.
1150    o fix local version of read/write pickup (NH part) in rotating_tank/code
1151    o simplify EXCH interface:
1152     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
1153     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
1154    o added the regrid package
1155    o shelfice:
1156     - add a simple boundary layer scheme to reduce noise
1157     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
1158    
1159    checkpoint58n_post
1160    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
1161       local variable (not in common block).
1162    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
1163      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
1164      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
1165        to work with SingleCpuIO.
1166    o add "_d 0" to real constant of pkg/cfc subroutines ;
1167       update exp. cfc_exemple & tutorial_cfc_offline output files.
1168    o multi-threading and IO:
1169      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
1170        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
1171      - barrier before and after reading.
1172      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
1173      - avoid using MDS_WRITELOCAL for LAND pkg output.
1174      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
1175        common-block variables ; Allows multi-threading with master-thread IO.
1176    o change default MAX_NO_THREADS from 32 to 4 ;
1177      and stop cleanly when MAX_NO_THREADS is too small.
1178    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
1179    
1180    checkpoint58m_post
1181    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
1182       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
1183    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
1184       keep global_ocean.90x40x15 (for AD testing) with former secondary test
1185       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
1186    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
1187        add MITgcm_tutorials (= code + all the tutorials)
1188    o ecco, option to compute cost for total ssh (mean+anom)
1189    o consistent with addition of ptracer and ssh in pkg/profiles
1190    o profiles: adding ptracer and ssh
1191    o testreport: change multi-test output-file name
1192      (from output.txt.{name} to output.{name}.txt)
1193    o profiles: now ok for mutli-tiles case
1194    o seaice: add 4 parameters for different advection schemes for area,
1195      (effective) seaice thickness, enthalphy, and snow height. Their default
1196      is the standard parameter SEAICEadvScheme
1197    o calc_gw:
1198     - add cosFacU in zonal viscous flux (harmonic.visc.).
1199     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
1200       of tutorial_plume_on_slope.
1201    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
1202    o calc_gw: true flux-form, account for horizontal grid spacing.
1203      update rotating_tank results, but not plume_on_slope (affected at
1204      truncation level, 11 digits).
1205    
1206    checkpoint58l_post
1207    o calc_gw:
1208     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
1209     - remove side-drag for now (need to fix it); update plume_on_slope results.
1210     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
1211    o commit code to make SST/SSS weights spatially variable
1212      (based on either variable in-situ or variable initial T/S weights)
1213    o pkg/ecco:
1214      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
1215        now based on horizontally varying weights wthetaLev, wsaltLev
1216      * cost_averagesflags now returns year indices in addition to day, month
1217      * sflux balance is performed on annual basis
1218        (sflxumm, sfluxmm2, bal_sfluxmm)
1219      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
1220        including separate counting and multipliers
1221    o pkg/rbcs
1222      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
1223    
1224    checkpoint58k_post
1225    o testreport:
1226     - always build in dir. "build" (if not there, mkdir build instead of building
1227       & running in input)
1228     - run in dir run (if it exists), in build otherwise.
1229     - call prepare_run (if input/prepare_run exists)
1230     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
1231    o pkg/exf modifications to interpolation and rotation routines for more
1232       reasonable treatment of North Pole singularity: for tracers North Pole
1233       value is set to northernmost zonal-mean value, for zonal velocity it is
1234       set to zero, and for meridional velocity it is set to northernmost value.
1235    o pkg/exf/exf_check_range.F
1236     - add tile index to diagnostics and move stop statement to the very
1237       end of the routine.
1238    o pkg/diagnostics: (diagnostics_main_init.F)
1239      define title of isomorphic variables according to the current config.
1240    o pkg/thsice with pkg/seaice dynamics:
1241    - fix domain of computation (interior only, required for exf) and do exchanges
1242    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
1243    o towards a standard way of dealing with multi-threading in MONITOR
1244      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
1245    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
1246       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
1247    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
1248    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
1249    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
1250       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
1251    o tracer advection:
1252     - clean-up and simplify calc_common_factors.F
1253     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
1254       advection subroutine (but still not used within DST advection S/R)
1255    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
1256    
1257    checkpoint58j_post
1258    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
1259      from file (collects calls previously in FORWARD_STEP)
1260    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
1261    o adjoint store dir. adjusted accordingly
1262    o genmake2
1263      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
1264    
1265    checkpoint58i_post
1266    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
1267      on wind stress (SEAICEstressFactor defaults to 1.)
1268    o Total number of Timers is finite (<=40): comment out 2 non-essential one
1269      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
1270    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
1271      on CS-grid: no longer loosing mass.
1272    o exf & curvilinear-grid: no longer modify longitude xC & xG.
1273    o pkg/ggl90: fix sloppy output and fix a bug
1274    o pkg/seaice: added SEAICEuseEVPpickup parameter
1275      - Set to false in order to start EVP solver with
1276        non-EVP pickup files when using SEAICEuseEVP
1277      - fix sign error in diffusion in seaice_calc_rhs
1278    
1279    checkpoint58h_post
1280    * Modifications for bottom topography control
1281      o replace hFacC by _hFacC at various places
1282      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
1283      o add non-self-adjoint cg2d_nsa
1284      o update autodiff support routines
1285      o re-initialise hfac after ctrl_depth_ini
1286      o works for 5x5 box, doesnt work for global_ocean.90x40x15
1287    * Adding verification for 5x5 box (4-layer) bottom topography control
1288    
1289    checkpoint58g_post
1290    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
1291       used for mean seasonal cycle, mean diurnal cycle); add an example
1292       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
1293    o pkg/ggl90:
1294      - add parameter (minimum surface kinetic energy)
1295      - fix bug (avoiding division by zero)
1296    o couple pkg/thsice to pkg/seaice:
1297      - modify advection in seaice to accomodate new scalar fields to be advected
1298      - only muliDimAdection scheme work with seaice/thsice
1299      - mapping of thsice-variables to seaice-variables, back and forth
1300      - does not break the verification experiments, but does not give the
1301        desired results either
1302    o pkg/seaice
1303      - make (default) second order advection a bit less confusing?
1304    
1305    checkpoint58f_post
1306    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
1307      to pkg/seaice):
1308      - new routines thsice_map_exf and thsice_get_exf provide the interface
1309      - add an additional formal parameter to thsice_solve4temp
1310    o pkg/exf:
1311      - add new fields wspeed, snowprecip (to be able to couple to thsice)
1312      - correct Stefan-Boltzmann constant
1313      - new parameter for longwave surface emittance
1314      - separate some stuff from exf_bulkformulae into new routines  
1315        exf_radiation, exf_wind
1316      - add new parameters and constants: longwave emissivity for ocean, ice
1317        and snow, evaporation parameters over ice
1318      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
1319        either wind from stress or stress from wind
1320    o pkg/thSIce:
1321    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
1322    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
1323       and THSICE_CALC_THICKN
1324    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
1325    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
1326      to make debugging easier.
1327    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
1328    o pkg/bulk_force:
1329      - clean-up comments and parameters ;
1330      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
1331    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
1332      generate new output for test-experiment: aim.5l_cs.thSI
1333    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
1334      testreport accordingly
1335    
1336    checkpoint58e_post
1337    o SEAICE_CGRID adjoint done
1338    o R_STAR adjoint implemented.
1339      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1340      * need to sort out init. of h0facc, etc.
1341    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1342      to be able to use it in pure forward.
1343    
1344    checkpoint58d_post
1345    o upgrade simple test-experiment to tutorial example:
1346     step.1: duplicate the experiment and (step.2) will remove the old copy.
1347      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1348      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1349      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1350      tutorial_global_oce_biogeo    <- copy of dic_example
1351      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1352      tutorial_plume_on_slope       <- copy of plume_on_slope
1353      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1354      tutorial_global_oce_optim     <- empty for now (David ?)
1355      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1356     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1357    o correct a sign problem in cost_scat.F
1358    o obcs and ptracers: fix boundary conditions for advections schemes
1359      with larger stencil
1360    o thsice adjoint: start
1361    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1362      completeness
1363    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1364      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1365    o ptracers adjoint:
1366      * avoid extensive recomputatations
1367      * fix missing re-init. of gptr (missed by TAF)
1368    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1369      me to turn off the excessive output to STDOUT that this package produces
1370    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1371      and add those terms in Vector-Invariant formulation.
1372    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1373      if the control period (xx_hfluxperiod etc) is 0
1374    o in profiles pkg, clean routines and fix details
1375    o in ecco pkg, reading ssh data:
1376      fix problem in case the model does not start at iter0=0
1377    o fix mnc-pickup/restart for ptracers
1378    o new package prifiles:
1379      code to compute profile-based cost by Gael Forget
1380      (modifs in ecco, ctrl, autodiff)
1381    o Benign bug fix in initialization (spotted by M. Mazloff) of
1382      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1383    
1384    checkpoint58c_post
1385    o adjoint: finish NLFS adjoint and provide reference output in
1386      verification/global_ocean.90x40x15/results_ad_nlfs
1387    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1388      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1389      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1390      with SEAICE_CGRID defined.
1391    o move calendarDumps from "data" to "data.cal" and clean-up the code
1392      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1393    o add useEXF & useCAL flags (for now, set in hard-coded way)
1394    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1395      (were missing in NH mode, and wrong in quasihydrostatic mode).
1396      waiting for Chris updated version of calc_gw to add those CALLs.
1397    o fix bug in quasihydrostatic S/R ;
1398      add a test for this option: global_ocean.90x40x15.qshyd
1399    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1400      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1401    o add on/off flag useOffLine for package OFFLINE
1402    o seaice:
1403      - modify advection so that it works also on the C-grid
1404      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1405        problem in multi-tile runs with C-grid
1406      - add flags for clipping ice velocities and/or masking solver forcing
1407      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1408        C-grid solver
1409      - added a few comments to seaice_diffusion.F
1410      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1411        are now exclusive)
1412      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1413        required re-ordering the code a little:
1414       + make DAIRN global variable (defined in SEAICE)
1415       + move computation of the viscosities eta and zeta into a new separate
1416         routine (because I need to recompute them in seaice_ocean_stress.F)
1417    
1418    checkpoint58b_post
1419    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1420      update output.txt of exp. aim.5l_cs.thSI
1421    o various mnc cleanups and improvements:
1422      + shrink lookup tables by factor of ~4
1423      + better error reporting when running out of lookup space
1424      + able to handle longer path/file names (up to 500 chars)
1425    o adjoint:
1426      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1427      - TBD: "hidden" mom_vecinv recomp. in dynamics
1428    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1429     (allow to differentiate between forcing components using new integer flags:
1430      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1431     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1432    o ecco
1433      - enable trend removal from SSH anomaly obs.
1434    o adjoint
1435      - a fix for PmEpR when #undef EXACT_CONSERV
1436      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1437      - try to fix "hidden" recomp. in forward_step for NLFS
1438        (NLFS seems broken sometimes after I checked it in)
1439    o seaice:
1440     - add c-grid version of the dynamic solver:
1441       + three new routines that are the c-grid substitute lsr, dynsolver
1442         and ostres
1443       + put a few fields that were local to dynsolver into global common
1444         blocks, so that I can move the computation of stresses etc into
1445         seaice_lsr (saves coding but may break the adjoint).
1446     - replace more hardwired parameters by runtime parameters
1447     - add ice masks that mask the rhs of the implicit solvers where there
1448       is no ice (commented out in seaice_dynsolver, because i am not sure
1449       if this works properly), eventually this should replace the clipping
1450       of ice velocities in seaice_dynsolver to +/-40cm/s.
1451    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1452      include it only where its needed
1453    o move balancing of fluxes before the call of external_forcing_surf
1454    o seaice:
1455      - correct units of turning angles (now they are really in degrees)
1456      - move computation of GWATX/Y out of main routine into dynsolver
1457      - initialize GWATX/Y in seaice_init
1458    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1459      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1460    o seaice: add runtime flags for turning angles (default to zero)
1461    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1462      and trend from exf forcing and ctrl control adjustments
1463    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1464      (since checkpoint57x_post)
1465    o change the default rotation period to 86164.s = the Earth rotation
1466    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1467      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1468    o seaice advection: add code for choosing between the default (2nd order
1469      central differences) and multiDim advection schemes provided by
1470      pkg/generic_advdiff
1471    o seaice:
1472      - removed all references to SEAICE_GRID.h fields from
1473        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1474        (cubed-sphere configuration will change a little)
1475      - grid computations in seaice_init are obsolete now.
1476      - cleaned up code a little so that is easier to read (hopefully).
1477      - added new (better?) discretizations of default advection and diffusion
1478        (turn on with SEAICEuseFluxForm)
1479      - replace 1 in 3d global fields by kSurface in growth.F
1480      
1481    checkpoint58a_post
1482    o seaice:
1483      - bug fix in advect.F
1484    o shelfice:
1485      - separate shelfice load anomaly from pload (breaks with time
1486        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1487        Its default is 0., but it may be computed more cleverly from (unknown)
1488        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1489        done offline. A good approximation of the pressure load anomaly is
1490        necessary to avoid large initial adjustment processes underneath
1491        deep-reaching shelfice.
1492      - small fix in ISOMIP shelfice_thermodynamics
1493      - add more sophisticated thermodynamics of Hellmer (1989), this is
1494        now the default
1495      - give a few constants more intuitive names
1496    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1497      if bulk formulae are used in long integration (especially EmPmR). Turn
1498      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1499      if balancePrintMean, the imbalance that is substracted is printed to
1500      STDOUT.
1501    o fix bug (typo) in obcs_apply_eta.F
1502    o add a new package shelfice which enables us to model the circulation
1503      underneath shelf-ice with draughts of hundreds of meters.
1504     - works
1505     - to do: + include improved thermodynamics
1506              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1507                instead of new field kTopC
1508              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1509                instead of new field R_shelfIce and new code in ini_depth.F
1510                and ini_mask_etc.F?
1511              + adjust vertical mixing schemes?
1512    o seaice pkg:
1513     - add a cpp-flag to include a simple formula for a salinity dependent
1514       freezing point of sea water at the surface
1515     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1516       meridional stresses are now different (and hopefully correct)
1517    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1518       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1519       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1520    o pkg/diagnostics: add options and parameters for regional-statistics
1521       diagnostics ; define regions by reading a region-mask from a file
1522       (might add other options later)
1523    o pkg/bulk_force:
1524     - add option and parameters to use AIM surface-flux formulae.
1525     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1526       others forcing fields (defined in PARM05, parameter file "data") are loaded
1527       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1528     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1529     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1530     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1531       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1532     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1533    
1534    checkpoint58
1535    o add "--embed-source" option to genmake2 which, when the supporting
1536      tools can be compiled (as determined by genmake2) will turn on the
1537      embed_files package which then embeds the entire MITgcm source code
1538      (*.[fFhc] + Makefile) used for the build within the executable
1539      - requested by CNH but off by default
1540      - adds a paltry <9MB to the mitgcmuv executable in most cases
1541      - only writes the output when useEMBEDSRC in eedata is true
1542    o clean up 3-dim. relaxation codes:
1543      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1544      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1545      * Thanks to Tom Haine for testing!
1546    
1547    checkpoint57z_post
1548    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1549      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1550    o fix the pickup behavior for obcs in combination with ptracers
1551    o fix a bug in ptracers_external_fields_load
1552    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1553      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1554    o transfered surface NH pressure to eta field (if exactConserv).
1555    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1556         and update lab_sea output.txt file.
1557    o completing 3-dim. relaxation code: additional term
1558         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1559      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1560      * At compile time, in "EXF_OPTIONS.h" set
1561          #define  ALLOW_CLIMTEMP_RELAXATION
1562          #define  ALLOW_CLIMSALT_RELAXATION
1563      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1564          tauThetaClimRelax3Dim = 15552000.0,
1565          tauSaltClimRelax3Dim  = 15552000.0,
1566      * 3 cases:
1567          1) Use a constant-in-time 3-dim. field
1568          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1569          3) Real-time relax. to time-evolving prescribed field
1570    o Adding Laplacian-type smoothness constraint on
1571      initial and boundary (forcing) controls (ic, bc)
1572      * enable at compile-time via
1573        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1574      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1575      * Absolute scale somewhat unclear so far
1576      * no area weighting was included since no other cost term does so far
1577    
1578    checkpoint57y_post
1579    First step for a NLFS adjoint
1580    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1581    o new init. routines for calc_r_star, calc_surf_dr
1582    o still need to deal with ini_masks_etc
1583    o testreport seemed happy
1584    checkpoint57y_pre
1585    
1586    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1587    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1588    o add new offset feature to offline pkg (plus minor cleanup)
1589    o cfc fixes for final year of integration
1590    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1591      be in GCHEM_OPTIONS).
1592    
1593    checkpoint57x_post
1594    o fix testreport Pb in multiple test experiment.
1595    o cleanup our namelist syntax in verification:
1596      - make it more F95 standards compliant (some work still needed)
1597      - allows the vast majority of our tests to work with gfortran
1598    o Non-Hydrostatic:
1599     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1600     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1601    o Allow to apply AB on T,S rather than on AB(gT,gS):
1602     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1603     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1604       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1605     - need a "clever" read_pickup to restart from the other AB formulation
1606    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1607    o remove some unused variables (reduces number of compiler warnings)
1608    o adjoint
1609      * Disable useVariableViscosity for adjoint for time being
1610        (there are a number of extensive recomputations)
1611      * Initialize certain variables needed for adjoint
1612    
1613    checkpoint57w_post
1614    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1615                 fix the singleCpuIO RS version of MDSWRITEFIELD
1616       and add a WARNING if using globalFiles=T with multi-processors.
1617    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1618      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1619    o tracer advection scheme:
1620      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1621       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1622       was not very convenient).
1623      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1624       (further tests needed for the implicit DST & Flux-Limiter schemes).
1625    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1626      and sRef for convenience, handy, when you want to initialize
1627      ptracers in a large domain with a constant non-zero value. Also,
1628      untangle ptracers_init.F a little.
1629    
1630    checkpoint57v_post
1631    o change dome exp. to use variable viscosity in side-drag terms.
1632    o remove all the files from the cfc_offline test since they are now
1633      incorporated into tutorial_cfc_offline which has been producing
1634      identical results for a few days of testing
1635    o add new parameter: sideDragFactor to enable half-slip-side BC
1636      and change side-drag S/R to use viscosity from mom_calc_visc
1637      (can switch back by setting sideDragFactor=0.); affects results at
1638      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1639       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1640    o vorticity & strain are now computed without masking, to account for
1641      no-slip-side BC in variable viscosity calculation ; mask is applied
1642      anyway later on, before computing advection/coriolis terms.
1643    o modify exp4 to test new obcs support for reading from external files
1644      and for passive tracers
1645    o fix behavior of ptracers_monitor when monitor output is written to a
1646      netcdf-file; still not independent of monitor.F (writes in the same
1647      file).
1648    o change default value of tRef (put a uniform, meaningful value for ocean
1649      & atmos) and initialize sRef (was missing, as Martin mentioned).
1650    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1651      to be proportional to enstrophy dissipation length.  Thus,
1652       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1653      This is now consistent with Smagorinsky and with the manual.
1654    
1655    checkpoint57u_post
1656    o OBCS and PTRACERS: add open boundary support for passive tracers
1657      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1658        OB-values from file; this is not different from the way theta and salinity
1659        are treated
1660      - however, Orlanski-radiation conditions are not supported, and the model
1661        will stop if you use pTracers and Orlanski at the same time.
1662      - beefed up the rountine obcs_external_fields_load: now only those open
1663        boundary values are overwritten with values from files for which there
1664        are really files, otherwise the OB-fields remain untouched. This makes
1665        it possible to use different OBs at different ends of the domain (as
1666        with EXF)
1667    o reduce number of exch calls in shap_filt (s2).
1668    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1669      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1670    
1671    checkpoint57t_post
1672    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1673    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1674      same truncation, independent of the face number: affects affects several
1675      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1676    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1677      note that biharmonic viscosity + no-slip was not tested in any experiment.
1678    o fix bug in non-linear free-surf side-drag ; generate new output for
1679      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1680    o make mnc honor the writeBinaryPrec flag for most kinds of output
1681    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1682    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1683      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1684    o add brackets in multi-terms sum to get same truncation, independent of
1685      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1686      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1687    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1688      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1689      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1690      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1691      Suggested values of viscosity parameters found in mom_calc_visc.
1692      Many new viscosity diagnostics available.
1693    
1694    checkpoint57s_post
1695    o Add clearing-house for viscosity calculations, mom_calc_visc and
1696      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1697      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1698      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1699      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1700      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1701      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1702      ViscAhStrain and viscAhTension are now retired.
1703    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1704    o In response to JMC's bug report, genmake2 now ignores any soft-links
1705      that it finds in the *current* directory when searching for files.
1706      Soft-links found in any other source directories will still work as
1707      they did before.
1708    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1709      a C routine to unlimit the stack size
1710    o mnc-ify pkg/aim snapshot vars
1711    o mnc-ify pkg/land as requested by Daniel
1712    o various changes to mnc including:
1713      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1714      - output can now be grouped so that all files within a group
1715          change the ITER portion of their names in lock-step together
1716      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1717          and works with both EXCH1 and EXCH2 (but needs more testing)
1718      - writing works for all verification test cases w/ g77 on Linux
1719    
1720    checkpoint57r_post
1721    o make MNC variable initialization happen earlier
1722    o add diagnostics for (almost) each term of the momentum Eq.
1723    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1724    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1725    o remove MINIMAL_TAVE_OUTPUT option ;
1726      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1727    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1728      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1729    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1730    o add time-dependent SST, SSS control
1731    o cost terms in ecco/ modularized (new cost_generic.F)
1732    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1733    o new infrastructure for seaice model vs. obs misfits in seaice/
1734      * driver from the_main_loop.F is seaice_cost_driver.F
1735      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1736      * gradient check in Exp. 6a of natl_box_adjoint/
1737    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1738      (see README file)
1739    
1740    checkpoint57q_post
1741    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1742    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1743      - bug was reported by Jean-Michel and Ian Fenty
1744    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1745      update exp. cpl_aim+ocn output.
1746    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1747      Needed for high-res. runs with large global files
1748      to be able to limit tapelev size
1749    o Changed some tests for adjoint:
1750      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1751      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1752      * global_ocean.90x40x15/ back to default 3-level checkpointing
1753    o Modifications to enable scripted COMMON to MODULE conversion
1754      * verification/OpenAD/code/ has necessary scripts and description;
1755      * converts, compiles and runs successfully;
1756    
1757    checkpoint57p_post
1758    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1759    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1760      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1761    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1762    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1763      (was already the case for dissipation with mom_vecinv,
1764       and also the case for grad.PhiHyd when staggered-timeStep)
1765      This will allow to put dissipation out-off the AB time-stepping.
1766     Unfortunately, affects truncation error. Update output of exp. that "fails"
1767      (cg2d matching number) and leave the others for later: front_relax(10),
1768      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1769      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1770    
1771    checkpoint57o_post
1772    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1773      (2) its ready to be documented during the 20050801 DocFest
1774    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1775      for ideal_2D_oce and lab_sea on linux_ia32_g77
1776    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1777      in global1x1_tot/code_seaice_adj to access indices 32, 33
1778      (worth another tag)
1779    
1780    checkpoint57n_post
1781    o adding precip control xx_precip 32
1782    o adding swflux control xx_swflux 33
1783    o Replacing 10 forcing penalty cost routines by 1 generic.
1784    o Implementing partitioning in time-mean and variable adjustment
1785      for atmos. state.
1786    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1787    o in natl_box_adjoint:
1788      * updated exp 1 to 10
1789        (but does not have time-mean vs. variable split results yet)
1790    o updated global1x1/*_seaice_adj/
1791      to incorporate latest changes
1792    o enable useSingleCpuIO for mdsio vector routines
1793      (applies in particular to tapelev I/O)
1794    o removed inefficient K-loop in all active_file*control*.F
1795    
1796    checkpoint57m_post
1797    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1798      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1799    o pkg/exch2: filling of face-corner halo regions is optional
1800      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1801    
1802    checkpoint57l_post
1803     tag before updating tutorials (pre-release-2)
1804    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1805       for output and interpolation of input fields onto model grid)
1806    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1807       Affects results of exp. rotating_tank ; update output.txt.
1808    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1809          and taking the square quantity and/or using a fraction-weight field.
1810    o fix aim_diagnostics_init.F mate numbers.
1811    o add mnc output capability to diagnostics/diagstat and update
1812      our cvsignore files for the ACSII output generated
1813    
1814    checkpoint57k_post
1815    o lab_sea now uses diagnostics package and provides a suite of
1816      new EXF diagnostics output.
1817    
1818    checkpoint57j_post
1819    o exf
1820      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1821        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1822        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1823      * extended diagnostics output
1824        - now includes all EXF variables
1825        - hs, hl moved to common block
1826        - separate S/R for diagnostics, called after ctrl vector is added
1827        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1828        - EXFqnet contains true Qnet (i.e. includes qsw)
1829      * updated verif. lab_sea, global_with_exf
1830      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1831        to ensure that diagnostics sees a true EXFqnet
1832    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1833    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1834      several times with different frequencies.
1835    o mnc-ify the thsice package as requested by Daniel Enderton
1836      - the monitor--MNC output needs work
1837      - many attributes need to be added (most are currently blank)
1838    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1839      - many attributes need to be added (most are currently blank)
1840    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1841    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1842    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1843      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1844         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1845    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1846     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1847    
1848    checkpoint57i_post
1849    o Diagnostics package was changed: diagnostic allocation is now deactivated
1850      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1851    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1852      add 1rst Order upwind vertical Shear.
1853    o add a quick fix for A/B checkpointing in OFFLINE mode
1854    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1855      end-run around the C/Fortran linking horror in eesup/src/timers.F
1856    o added pkg/runclock: allows user to terminate run based on wall clock
1857    o added non-hydrostatic scaling parameter: nh_am2
1858    o pkg/my82: futile attempt to make results compiler-independent by adding
1859      some "_d 0", etc. no effect.
1860    o for mnc output, fill the 'T' coordinate var with myTime and create a
1861      separate 'iter' variable for iteration count
1862    o pkg/diagnostics:
1863      add new capability: output of Global/Regional & per-level statistics ;
1864      tested against monitor output (including land & thSIce) on various exp.
1865    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1866    
1867    checkpoint57h_done
1868      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1869      data.diagnostics, data.gchem, data.ptracers) is done.
1870    
1871    o pkg/diagnostics: prepare for Global/Regional statistics.
1872      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1873    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1874      and rename it: DIFFERENT_MULTIPLE
1875    
1876    checkpoint57h_post
1877    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1878    o pkg/diagnostics: change output frequency, now in seconds (instead
1879      of Nb of iterations). This requires to change data.diagnostics.
1880    checkpoint57h_pre
1881    
1882    o in mnc, let the user create the output dir if both mnc_outdir_date
1883      and mnc_outdir_num are false
1884    o add fflags() to pkg/diagnostics which allows one to specify, on a
1885      per-file basis, the file precision [default behavior is unchanged]
1886    o added diagnostics to pkg/kpp, including computation of mixed layer
1887      depth based on a temperature/density criterion
1888    o updated verification/natl_box to test the new pkg/kpp diagnostics
1889    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1890    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1891    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1892      not mnc -- this mistake was found by JMC and is now corrected
1893    
1894    checkpoint57g_post
1895    o add Adams-Bashforth 3rd Order time stepping:
1896      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1897      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1898    checkpoint57g_pre
1899    
1900    o make lambda[Theta,Salt]ClimRelax spatially varying
1901      (default remains spatially uniform constant based on tau)
1902    o added new control variables
1903      * init. uVel, vVel, etanN
1904      * lambda[Theta,Salt]ClimRelax
1905    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1906      (suggested by G. Forget)
1907    
1908    checkpoint57f_post
1909    o add parameter "baseTime" = model base time = time at iteration zero
1910      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1911      account for baseTime shift
1912    o move Coriolis arrays from PARAMS.h to GRID.h
1913    checkpoint57f_pre
1914    
1915    o mnc-ifying the seaice package
1916    o introduced an alternative length scale calculation for use in the limiting
1917      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1918    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1919    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1920      as well as grad(vort3).  Made it compatible with both approximate form
1921      for the cubed sphere and full form of these gradients.  Added flag
1922      useFullLeith to select between approximate and full form.  
1923    o add "d0" in getcon.F to reduce differences between compilers/platforms
1924      update output.txt of exp. fizhi-gridalt-hs
1925    o change port_rand funtion to allow to set the seed.
1926    o fix obscure MNC bug involving conversion between reals and integers
1927      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1928        new version is now more standards-compliant
1929    o adjoint-related modifications
1930      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1931      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1932      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1933    
1934    checkpoint57e_post
1935    o Adding eddy stress controls a la Ferreira et al.
1936    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1937    
1938    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1939      update output.txt of exp. fizhi-gridalt-hs
1940    o add more "Z" dimensions and associated coordinate vars to MNC
1941    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1942    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1943      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1944      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1945      months and years.  Requires pkg/cal.
1946    o diagnostics: add pickup functionality
1947      - off by default for backwards compatibility
1948      - current version only uses MDSIO -- MNC will be added
1949    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1950    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1951    
1952    checkpoint57d_post
1953    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1954    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1955      output from the diagnostics package
1956    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1957    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1958      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1959    o add coordinate variables to the MNC output from the diagnostics package
1960    o change MNC-flags default value: true when useMNC=TRUE
1961    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1962      the ability (off by default) to read the grid information using MNC
1963    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1964    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1965    o do snap-shot diagnostics at the middle of the time-interval (instead of
1966      at the end).
1967    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1968      new test for AIM with thSIce + slab-ocean
1969    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1970    o move state variable diagnostics to the beginning of the time step ;
1971      (note: still needs some work specially for snap-shot diagnostics)
1972      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1973    
1974    checkpoint57c_post
1975    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1976    o generate new output.txt files on faulks with g77 & the new -ieee option
1977    checkpoint57c_pre
1978    
1979    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1980      update output.txt of exp. global_ocean.90x40x15
1981    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1982      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1983    o add saltFlux(+File) forcing capability with periodicExternalForcing
1984    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1985    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1986    o improvements for the MNC output from DIAGNOSTICS:
1987      - correct handling of the unlimitied dimension
1988      - all dims now have associated coordinate variables
1989      - variables located at U, V, and Corner ("Z") points are now written
1990        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1991        *all* data points are output
1992    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1993    o added pkg/seaice/seaice_monitor.F
1994    o mdsio_readfield.F can now read files visible only to master MPI process.
1995    o pkg/seaice: some test code for ice-modified ocean stress
1996    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1997      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1998      spurious negative numbers for precipitation and humidity.  Will cause
1999      some small numerical differences for integrations using pkg/exf/exf_interp.F.
2000    o pkg/ctrl/
2001      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
2002        May be enabled via doPackDiag
2003      *  introduce z-scaling of
2004         + gradient (doZscalePack) and
2005         + control (doZscaleUnpack)
2006    o pkg/mdsio/
2007      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
2008      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
2009    
2010    checkpoint57b_post
2011    o simplify options in diagnostics_fill arguments (remove weird combinations)
2012    o fix MNC coordinate variables so that they now contain per-face index
2013      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
2014      general, EXCH2 grids are only aligned to a "local" coordinate system
2015    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
2016    o Implement instantaneous output within pkg diagnostics:
2017      setting a negative frequency in data.diagnostics produces
2018     "snap-shot" output (as opposed to time-average if freq > 0)
2019    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
2020      NOTE: change ptracer diagnostics name: use 2 characters to work with
2021            more than 9 tracers. Add also diagnostics of advect & diffus flux.
2022    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
2023      becomes the coordinate variable for the 'T' dimension
2024    o add CF-style coordinate variables to MNC
2025      - just a first cut:  numbers are meaningless on the cubesphere and
2026        missing along the T axis but otherwise it works!
2027    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
2028    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
2029    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
2030      this is based directly on what the model compute, so that the content of
2031      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
2032    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
2033    o clean up build options files for SunOS, in particular
2034      - remove -traditional from xmakedepend
2035      - change -xarch=v9 to -xarch=native for f77
2036      - restore use of make (not gmake)
2037      - add CC=gcc if using g77
2038    o changes per discussion of AM, JMC, & EH3 today:
2039      - move redundant "grid" variables out of "state" -- in preparation of
2040        creating proper CF-style coordinate variables and in recognition
2041        that any/all grid variables can be easily copied (eg. w/NCO) from
2042        the grid files into any of the other NetCDF files
2043      - *always* output grid variables with MDSIO (this will eventually be
2044        changed)
2045      - output MNC grid file if useMNC is true
2046    o every instance of _END_MASTER() has been found and replaced with
2047      _END_MASTER( myThid ) in order to satisfy certain picky Sun
2048      preprocessors
2049    o re-arrange diagnostics pkg initialisation:
2050     - allow each package to extend the available diagnostics list
2051     - add some checking and fix small problems (multi-threaded, ...)
2052     - new S/R diagnostics_fill (replace fill_diagnostics):
2053       look through the short list of active diag. (instead of the long list)
2054       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
2055    
2056    checkpoint57a_post
2057    o this set of changes restores TAMC compatibility
2058      tested for global_ocean.90x40x15 adjoint on trough
2059      (what a pain)
2060    
2061    checkpoint57a_pre
2062    o some modifs in tools/build_options for sunos
2063    o call ctrl_pack for ctrl at end for optimcycle=0
2064    
2065    checkpoint57
2066    o add horizontal bi-harmonic viscosity for vertical velocity
2067      - new parameter viscA4W (defaults to viscA4)
2068      - affects only non-hydrostatic code
2069      - to be done: no-slip lateral boundary conditions
2070    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
2071    o implement Implicit Vertical advection for pTracers
2072    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
2073      (implemented also for implicit vertical diffusion & advection)
2074    o OBCS: extend application of tracer open boundary conditions
2075      to a strip beyond the boundary of width Olx/Oly
2076    o add call monitor to TAF set of required calls (flow directives)
2077      and include in natl_box_adjoint
2078    o untangle a few ifdefs related to cost, ctrl, autodiff
2079      untangel a few ALLOW_ECCO_OPTIMIZATION
2080    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
2081      (theta2, salt2 in ecco_cost_weights)
2082    
2083    checkpoint56c_post
2084    o OBCS as control variables
2085      - update ctrl_ad_diff.list, obcs_ad_diff.list
2086      - remove balance of obcs controls from default
2087      - fix index bug nobcs in ctrl_init
2088      - fix dummy fields filen in ctrl_pack
2089      - add dummy weights for obcs
2090    o lsopt: comment out fort.94 output
2091    o optim:
2092      - remove unnecessary header files
2093      - adjusted namelists
2094      - add xerbla.F to Makefile
2095    o exf:
2096      - multiple modifications of exf_check_range
2097      - unit change in exf_init_runoff from [m/year] to [m/s]
2098    o mdsio:
2099      - i/o-vector change debugLevel from debLevA to debLevB
2100    
2101    checkpoint56b_post
2102    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
2103      is called from DO_THE_MODEL_IO
2104      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
2105      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
2106      - clean up PTRACERS_WRITE_TIMEAVE a little
2107    o add another verification experiment that tests both the cfc-pkg and
2108      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
2109      reactive tendencies treated inline with regular timestepping
2110    o testreport previously did a lousy job of comparing small numbers, so
2111      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
2112      implemented in the little c-progam tmp_cmpnum.c which is embedded in
2113      testreport.
2114    o ptracers_monitor: bug fix for MPI
2115    
2116    checkpoint56a_post
2117    o GCHEM: finish reorganizating the package
2118      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
2119        (introduces another 3D-array for each passive tracer, but only if
2120        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
2121        gchemTendency is not needed because the timestep is done separately)
2122      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
2123      - GCHEM is now---more or less cleanly---separate from PTRACERS
2124      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
2125        so clear to me how that should be done in a general way.
2126    o CFC: improve formatting of output in CFC_ATMOS
2127    o PTRACERS:
2128      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
2129        that ALL experiments with ptracers enable can be checked. This makes
2130        GCHEM_MONITOR obsolete.
2131      - include a runtime parameter PTRACERS_monitorFreq that defaults to
2132        monitorFreq
2133      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
2134    o add PTRACERS (PTR0[1-5]) to testreport output
2135    o exf_check_range:
2136      * default changed to .TRUE.
2137      * will check values for niter0 if debLevA, every timestep if debLevB
2138      * STOP in exf_check_range if 'out of range'
2139      * range chosen generous to allow for potential extema
2140      TBD: a version with stricter range
2141           permitted range would be runtime parameters
2142    o GMredi:
2143      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
2144      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
2145      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
2146    o GCHEM:
2147      - move call to GCHEM_FORCING_SEP, so that it is now called before
2148        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
2149      - introduced a useGCHEM runtime flag and applied it everywhere.
2150      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
2151        this flag is now only visible within GCHEM-pkg routines.
2152      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
2153        be replaced by a 3D array that is computed before thermodynamics; for
2154        this, the tracer ID iTracer had to be included into the parameter list
2155        of ptracers_forcing
2156      - set up forward_step to call gchem_forcing, that will replace
2157        gchem_forcing_int in ptracers_forcing
2158      - cleaning up
2159    o small cleaning of exch2: remove files that are also in eesupp/src
2160    
2161    checkpoint56
2162    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
2163    o mnc: cleanup "full" files--fixes out-of-memory problem
2164    o ECCO-GODAE
2165      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
2166      * fully merged and updated from SIO code
2167        windstress sign change affects
2168        - exf_inscal_[u/v]stress
2169        - sign of xx_tau[u/v] adjustments
2170        - signs in cost_scat
2171      * ctrl_get_gen: avoid update of tau[u/v] for first few days
2172      * natl_box_adjoint updated and compressed
2173      * 2-level checkpoint switch added
2174        (tested in EXP. 1 of natl_box_adjoint)
2175      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
2176    o SVD
2177      * first complete, non-hacked version for SVD calculations
2178      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
2179        performed via direct access files admtlm_vector.it????
2180        (via ctrl_[un]pack)
2181      * optimcycle is used for ARPACK iteration counter
2182        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
2183      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
2184        and add linear transforms where necessary
2185      * controls are initial/final SST, SSS (can be extended; need to check
2186        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
2187    o mdsio: filename info to both stderr, stdout
2188    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
2189      from sign change
2190    
2191    checkpoint55j_post
2192    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
2193      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
2194    o add consistent build directories and .cvsignore files to verification
2195    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
2196    o make all subroutines 30 or less characters in length for certain older
2197      compilers to work (a thorough search only turns up two routines in
2198      pkg/ptracers)
2199    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
2200      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
2201    
2202    checkpoint55i_post
2203    o change arrays for total vertical diffusivity (2.D if explicit,
2204      3.D if implicit) ; each ptracer uses its own background value.
2205    o added mnc/NetCDF output capability to ocn_compon_interf
2206      - added bits to verification/cpl_aim+ocn so that it can run on
2207        ITRDA and other clusters without the mpirun "-wd" option
2208    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
2209      configuration
2210    o give MNC the ability to create additional files rather than
2211      exceeding a specified file size limit "MNC_MAX_FILESIZE"
2212      - the default is just less than 2GB which is a practical limit
2213        on many systems
2214    o Compute the non-local term using either KPP vertical diffusivity (=default)
2215       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
2216    
2217    checkpoint55h_post
2218    o add verification test "vermix"
2219    o remove all the *_ioinc flags and replace with the single global
2220      outputTypesInclusive flag
2221    o allow to set a vertical profile of vertical diffusivity for T & S
2222    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
2223    o useMNC moved from data.mnc to data.pkg
2224    
2225    checkpoint55g_post
2226    o Renaming carbon AD experiments to comply with testreport conventions
2227    o Updating adjoint of Held-Suarez hs94.1x64x5
2228    o Fixing directives for non-ECCO forward_step, after ECCO directives
2229      have been fixed to avoid recomp. of do_oceanic_phys
2230      Works well for global_ocean.90x40x15,
2231      but recomp. issue remains for carbon
2232    o Updating adjoint output for natl_box_adjoint after
2233      pkg/ecco has been modified (see taga c55d_post)
2234    
2235    checkpoint55f_post
2236    o rename to timeave_init_fixed
2237    
2238    checkpoint55e_post
2239    o some delicate re-shuffle of store directives to avoid one
2240      extra call of do_oceanic_physics
2241      affects ecco_the_main_loop.F, do_oceanic_physics.F
2242      checkpoint_lev1_directives.h
2243    o NB: this may break global_ocean adjoint temporarily,
2244      but it is clear how to fix it. Will do later, need this now.
2245    
2246    checkpoint55d_post
2247    o ECCO specific cost function terms (up-to-date with 1x1 runs)
2248    o ecco_cost_weights is modified to 1x1 runs
2249    o modifs to allow observations to be read in as
2250      single file or yearly files
2251    o enable to read exf forcing fields as either
2252      single file or yearly files (flag useExfYearlyFields)
2253    checkpoint55d_pre
2254    
2255    o switch between 2-level and 3-level checkpointing
2256    o add ability of MNC to write local and "partial" (eg. 2D slices where
2257      the full 3D field is never actually stored) arrays to NetCDF files
2258      with the correct (that is, the complete multi-dimensional) set of
2259      array indicies
2260      - used in mom_vecinv() to write the diagFreq output
2261      - tested (demonstrated) in verification/aim.5l_cs
2262    o further mnc-ification
2263      - add verification/lab_sea to the list with mnc setups
2264      - fix undefined mnc v-names in cd_code
2265      - add kpp to mnc output (both snapshot and timeave)
2266    o non-hydrostatic code
2267      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
2268        in calc_gw.F
2269      - defaults to viscAh
2270      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
2271        friction or Leith) in non-hydrostatic mode, as long as there is
2272        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
2273    o pkg/cost
2274      extend simple cost functions to treat time mean quantities
2275      (T,U,V) via cost_accumulate_state from cost_tile
2276    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
2277        be 2 times larger than the minimum size the advection scheme requires.
2278        now get a perfect conservation of salt in advect_cs test-exp (updated)
2279    o GGL90 (Gaspar's TKE mixed layer)
2280      - add horizontal diffusion of TKE, requires exchanges in
2281        do_fields_blocking_exchanges, horizontal diffusivity is zero by
2282        default. In OPA there is no horizontal diffusion of TKE but the
2283        mixing coefficients are computed from a horizontal average of TKE of
2284        6 points or so. I think that diffusion has a little more physical
2285        justification.
2286      - clean up ggl90_calc in the hope of reducing memory usage (this hope
2287        was in vain)
2288      - mask tke-variable in ggl90_init
2289    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
2290    o fix biharmonic diffusion on CS-grid.
2291    o more obcs stuff
2292      - added obcs_external_fields_load as an alternative to the EXF-pkg option
2293        for reading boundary values. This routine is called from
2294        obcs_prescribe_read
2295      - updated obcs_check
2296      - changed sponge layer relaxation parameter units for days to seconds
2297      - turned off sponge layer by default
2298      - changed argument list of OBCS_CALC to myTime+deltaTclock
2299      - fixed about 35 bugs in obcs_external_fields_load
2300    
2301    checkpoint55c_post
2302    o obcs stuff
2303      - new runtime flags useOBCSprescribe, useOBCSbalance
2304      - re-arranged obcs_calc
2305      - moved exf_getobcs to obcs_prescibe_read
2306        obcs_prescibe_read is called after ORLANSKI stuff
2307        and independent of it (executable can contain all).
2308      - updated obcs_check
2309      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
2310        These may be necessary only if tangential velocities are
2311        prescribed at OB, not sure, needs testing.
2312    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
2313      which simplifies the calls and passes the ifc check-bounds test
2314    
2315    checkpoint55b_post
2316    o add a 2D scalar, Z location, exchange_2 routine.
2317    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
2318      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
2319      affects advect_cs results (for the wrong reason): update output.txt
2320    o use a more standard discretization for biharmonic viscosity ;
2321     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
2322      affects results of dome set-up: update output.txt
2323    o fix gad_advection.F (CubedSphere part), back to version 1.23
2324    o fix bug in mom_vi_del2uv.F (CubedSphere part).
2325    
2326    checkpoint55a_post
2327    o merged code to
2328      * prescribe/read time-dependent open boundaries
2329        (works in conjunction with exf, cal)
2330      * sponge layer code for open boundaries
2331      * each boundary N/S/E/W now has its own CPP option
2332        (healthy for the adjoint)
2333    
2334    checkpoint55
2335    o up-to-date adjoint of previous breaks
2336      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
2337      - global_ocean_ebm: adjoint still needs fix (TLM ok)
2338      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
2339      - carbon: * remove tr1-related adjoint verification
2340                * add ptracer as control variable
2341    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
2342      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
2343    
2344    checkpoint54f_post
2345    o in verification/carbin/ remove experiment related to
2346      ALLOW_PASSIVE_TRACER (array tr1 etc)
2347      code_ad/ input_ad/ results_ad
2348    
2349    o add two new packages
2350      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
2351        + subject to optimization (memory)
2352      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
2353        + subject to reordering (many GOTOs in the original code)
2354        + so far opps is called for every (i,j) point, and then operates in
2355          the vertical; one may want to reorder the scheme in order operate in
2356          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
2357          fields)
2358    o overhaul of IO so that we now have flags for MDSIO and/or MNC
2359      - all verification tests compile and run with linux_ia32_g77
2360      - defaults are compatible with current input files--nothing
2361        should change if you were not previously using MNC
2362      - MNC output has been added in numerous places (eg. timeave)
2363        but there are still a few writes not yet do-able with MNC
2364        (this is in progress)
2365      - flags now allow for either/or/both use of MDSIO and MNC and
2366        documentation will soon follow
2367      - numerous small formatting cleanups for ProTeX
2368    o add version info (via BUILD_INFO.h) to MNC and stdout
2369    
2370    checkpoint54e_post
2371    o add two new packages
2372      - pp81 (Packanowski and Philander, 1981), Richardson number and
2373        stratification dependent mixing
2374      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
2375      - these scheme operate in a similar manner as KPP (without ghat, of
2376        course), however there is only one diffusivity that is used for both
2377        temperature and salinity (and passive tracers)
2378    o add offline package
2379    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
2380      provided by Stephanie Dutkiewicz
2381    o genmake2: add ability to search for C compilers and cleanup test output
2382      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
2383    
2384    checkpoint54d_post
2385    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
2386    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
2387      leading to additional shift by 5 days each year of integration
2388       (i.e. leading to considerable offset over the years)
2389    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
2390    o start with no AB and no initial filtering (staggerTimeStep):
2391      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
2392    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
2393      (external loading & cpl import/export stay in forward_step.F)
2394    o update coupling interface to work with new staggerTimeStep
2395    o change MDSIO ptracers_pickup.
2396    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
2397    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
2398    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
2399    
2400    checkpoint54c_post
2401    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
2402      this affects (truncation error) output.txt of test-exp:
2403       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
2404    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
2405    o change Qnet to always be the net heat flux, (+upward).
2406      affects (truncation error) output of natl_box exp.: updated
2407    o define the max number of passive tracers in PTRACERS_SIZE.h
2408    o start to test mnc routinely in exp0
2409    o add sea-ice loading (sIceLoad) as a new forcing field.
2410    
2411    checkpoint54b_post
2412    o add testreport "-j JOBS" option for parallel builds (tested and pretty
2413       impressive on Altix and Opteron systems)
2414    o diagnostics can now write NetCDF files through the mnc package
2415    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
2416    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
2417    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
2418      affects (truncation error) output of lab_sea & natl_box exp.: updated
2419    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
2420    
2421    checkpoint54a_post
2422    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
2423    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
2424    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
2425    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
2426      + internal_wave (shift in writing cg2d_ini_res)
2427    checkpoint54a_pre
2428    
2429    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
2430      - modified verification/lab_sea and natl_box_adjoint accordingly
2431    
2432    checkpoint54
2433    checkpoint53g_post
2434    o prepare splitting of thermodynamics: store convect.counter in common block
2435    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
2436      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
2437    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
2438    o new parameter "nShapS": allow to treat differently S from T (nShapT)
2439    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
2440    o restore adjointability
2441    
2442    checkpoint53f_post
2443    o modifications that affect AIM experiment results (update output.txt):
2444      - no advection of S at top interface Nr (pkg/generic_advdiff)
2445      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
2446    o AIM pkg:
2447      - include stability function into surf.Flux derivative relative to Tsurf
2448      - calculate clear-sky radiation & surface temp. change (for diagnostics)
2449    
2450    checkpoint53e_post
2451    o merged cylindrical coord configuration
2452    o added rotating_tank experiment
2453    checkpoint53e_pre
2454    
2455    checkpoint53d_post
2456    o faulks upgraded: re-generate output.txt that have changed:
2457       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
2458    o Added Bryan and Lewis, 1979, vertical diffusivity profile
2459    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
2460    o added Sadourny discretization of Coriolis
2461      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
2462      - re-enabled use of omega3 (useAbsVorticity)
2463    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
2464      vector-invariant equations
2465      - note: does *NOT* yet use same variable visc. for no-slip BC's.
2466    o recoded the lateral boundary conditions for non-hydrostatic w, this time
2467      hopefully without new bugs
2468      - still to do: biharmonic friction for non-hydrostatic w
2469    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
2470    o regenerated output for global_ocean_ebm (using -ieee)
2471    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
2472      of mom_common/
2473      - simple re-arrangement of instructions within computing loop
2474    checkpoint53d_pre
2475    
2476    checkpoint53c_post
2477    o new version of coupler for AIM+thSIce and Ocean models
2478     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
2479     - land: change Evaporation of snow
2480     - aim with thSIce: fix bug in snow-precip.
2481    o changes to calc_gw.F
2482     - bug fix for w^2 term near the bottom boundary
2483     - (hopefully) improve the lateral slip boundary condtions for use with
2484        partial/looped cells
2485      - because the bug fix changes two verification experiments anyway (exp5
2486        and plume on slope), change the lateral boundary condition from half slip
2487        to the value of no_slip_sides
2488    o ebm package wasnt quite up to the parallel task. Fixed that.
2489    o Adjoint of EBM package + verification
2490      * TLM OK
2491      * ADM not sufficient accuracy yet (needs further testing)
2492    
2493    checkpoint53b_post
2494    o Commiting new energy balance model to repository
2495      * package is pkg/ebm
2496      * verif. is verification/global_ocean_ebm
2497      * references are in ebm_driver.F
2498    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2499    C        Global thermohaline circulation. Part I:
2500    C        Sensitivity to atmospheric moisture transport.
2501    C        J. Climate 12(1), 71-82
2502    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2503    C        Global thermohaline circulation. Part II:
2504    C        Sensitivity with interactive transport.
2505    C        J. Climate 12(1), 83-91
2506    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
2507    C        Destabilization of the thermohaline circulation
2508    C        by atmospheric eddy transports.
2509    C        J. Climate 7(12), 1870-1882
2510    o Will need long integration testing.
2511    checkpoint53b_pre
2512    
2513    o created pkg/mom_common in preparation for variable viscosity code
2514    o renamed and split ini_mnc_io
2515    o pkg/land: only liquid water can diffuse or run-off
2516    o AIM using land: soil wetness availability account for snow
2517    o added printMapIncludesZeros to EEPARMS namelist
2518    
2519    checkpoint53a_post
2520    o restore TAMC compatiility for exf_constants.h
2521      (no usage of _d in .h)
2522    o Additional storing in KPP in an attempt to fix
2523      TAMC problem with adjoint of KPP code.
2524      (no success...)
2525      Identical code works fine with TAF.
2526    o Fixed verification/natl_box_adjoint experiments.
2527      Initial conditions for Experiments 4 and 5 are now
2528      set to "SEAICE_initialHEFF=0", which is more reasonable,
2529      and hence gives results closer to that of Experiment 2.
2530      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
2531    
2532    checkpoint53
2533    o stable checkpoint with up to date adjoint
2534      TLM tests only run for 1st grdchk at the moment. Its unclear if
2535      this is a code problem or a problem with resetting code for g_
2536      variables that is being autogenerated wrong.
2537      Otherwise:
2538       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
2539       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
2540         are both still in chaos following their security messes.
2541    
2542    checkpoint52n_post
2543    o various build (mostly genmake2) changes including:
2544      - ability to build/run more easily within Cygwin and MacOS X
2545      - more complicated Makefiles with a stronger dependence on Gnu Make
2546    o pkg/seaice modifications
2547      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
2548        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
2549        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
2550      - changed proxy for geostrophic velocity and updated
2551        verification/lab_sea/results/* accordingly
2552      - removed ADI dynamic solver from pkg/seaice
2553      - replaced all occurrences of 1/CSTICE or 1/CSUICE
2554        they caused a segmentation fault under certain circumstances
2555      - removed unused field WATR
2556    o bug fix in exf-package:
2557      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
2558         now reflect that.
2559    o small fixes in the cal-package:
2560      - set reference date to first of January for the 'model'-calendar
2561      - failing of cal_CheckDate in cal_FullDate now actually results in a
2562        warning
2563    o small modifications in exf-package to increase flexibility:
2564      - change climtempfreeze from a constant to a runtime parameter that
2565        is specified in data.exf_clim (default = -1.9)
2566      - introduce runtime parameter windstressmax (default = 2.0) that is
2567        specified in data.exf
2568    o fix in pkg/thsice:
2569      - update Evap (Tsf changes) to be consistent with Latent heat flux
2570      - maintain snow precipitation unchanged (even if Tsf >=0).
2571     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
2572    
2573    checkpoint52m_post
2574    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
2575      this does not change any of the results, because myIter=0 in swfrac always
2576      lead to jwtype=2 (the default anyway), but the call makes little sense
2577      as a default
2578    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
2579    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
2580      atmospheric model (AIM) to use it ; add a "slab ocean" component.
2581    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
2582    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
2583    o extending useSingleCpuIO option to work with new exch2 I/O format
2584      - old-style, missing-tile I/O is still accessible by defining CPP
2585        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
2586    o monitor package can write to NetCDF files and/or STDOUT
2587    o fix re-definition bug in MNC_GRID_INIT_ALL()
2588    o doc/api_reference added
2589      - a framework for building an API Reference Manual using all
2590        the "protex" comments embedded in the code
2591      - see pkg/generic_advdiff, pkg/mnc for examples
2592    o MNC:
2593      - make myThid the last argument for all subroutines
2594      - new default for the grid files: NO halos
2595      - add useMNC and other run-time flags
2596      - separate per-file-group handling of the unlimited dimension
2597      - early initialization of MNC w/ flags read at the eeboot stage
2598        and lookup tables set in initialize_fixed
2599      - write all MNC output to a freshly-created directory
2600    o thermodynamics sea-ice (thsice) is now tested with testreport.
2601    o test exp. advect_cs: use the standard cs32 grid ; update output.
2602    o Added functionality to grdchk:
2603      pick global i,j,k position (or nearest wet) where to perform check.
2604    
2605    checkpoint52l_post
2606    o new land formulation:
2607      a) use ground enthalpy as prognostic variable to ensure exact
2608         energy conservation.
2609      b) account for water temperature and for latent heat of freezing
2610         in all processes (rain, run-off, ground storage)
2611      c) compute surface and ground temperature implicitly.
2612    o aim_v23 modification for new land model:
2613      a) Treat separately land / ocean / sea-ice surface fluxes
2614         to allow implicit computation of land & sea-ice surface temp.
2615      b) add snow precipitation.
2616    checkpoint52l_pre
2617    
2618    o fix problem (when 1 tile is empty) in min/max monitor.
2619    o fix bug in timeAve (u,vZetatave in common block)
2620    o no restoring terms under ice for pkg/seaice
2621    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
2622    o bug fix for pkg/seaice pickups
2623    o change MNC call locations and add coordinate attributes
2624    o mask vorticity at the corner ; affects global_ocean.cs output
2625    o fix ini_curvilinear_grid ; test CS experiments with mpi
2626    o aim.5l_cs: modify sea-ice fraction input file ; update output
2627    o exf: Adding simple range check routine for exf fields after read
2628    
2629    checkpoint52k_post
2630    o removed top-level directory "diags"
2631      - we migrated these functions to pkg/timeave a long time ago
2632    o fixed bug introduced in pkg/monitor
2633    o accuracy ctrlprec = 32 insuffient for gradient checks using
2634      averaged fields (I/O via cost_averages)
2635      -> use ctrl.h in active_file*.F to control I/O precision.
2636    o paramter list of CALL ADTHE_MAIN_LOOP
2637    o added initial do_the_model_io to ecco
2638    o set all ...Freq to zero after cost_final
2639      taveFreq, dumpFreq, pChkptFreq
2640    o MAIN and ECCO differentiability restored
2641    
2642    checkpoint52j_post
2643    o fix nchklev in tamc.h for global_ocean...
2644    o Bringing flow and store directives up-to-date
2645    o Really weird thing!
2646      call do_the_model_io from the_main_loop with parameters
2647      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
2648      TAF places a faulty re-call of initialise_varia
2649      after cost_final call which should not be there!
2650    checkpoint52j_pre
2651    
2652    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
2653      error messages
2654    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
2655    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
2656      debug output
2657    o modfied mdsio_writefield.F to handle non-global files under exch2
2658    o update AIM Cubed-Sphere exp (aim.5l_cs):
2659      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
2660    o update AIM Equatorial Channel exp:
2661      use standard aim_v23 pkg and change the SST fields to be more realistic.
2662    o globalFile now works with exch2
2663    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
2664      mon_vort3.F to make exch2 friendly with >1 tile per cube face
2665    o limit timeave output for hi-res integrations
2666    
2667    checkpoint52i_post
2668    o removed CPP_EEOPTIONS.h from verification/*/code
2669    o updated the tiling for global_ocean_pressure
2670    checkpoint52i_pre
2671    
2672    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
2673      the old pkg/aim).
2674    
2675    checkpoint52h_pre
2676    o shortened offending lines in exch2_send_rx?.template
2677    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
2678    o genmake2: add build & execute test for NetCDF code
2679    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
2680      old grid files, moved CPP_EEMACROS.h to pkg/exch2
2681    o added useSingleCPUIO flag to monitor.F and mon_out.F
2682    o added temporary hack for sea-ice dynamics on the cube:
2683      metric terms are ignored and it is assumed that
2684      there is no sea-ice on cube faces 1, 2, 4, and 5.
2685    
2686    checkpoint52f_post
2687    o added exch2 cube routines to pkg/exch2
2688    o modified hs94.cs-32x32x5 to use it
2689    o added new grid files to hs94.cs-32x32x5
2690    checkpoint52f_pre
2691    
2692    checkpoint52e_post
2693    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
2694      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
2695    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
2696      to work with implicit vertical advection and AB ;
2697    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
2698    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
2699     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
2700    checkpoint52e_pre
2701    
2702    o fix bug in impldiff when Nr=1 or Nr=2.
2703    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
2704    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
2705    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
2706      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
2707    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
2708    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
2709    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
2710    
2711    checkpoint52d_post
2712    o re-tiled many expts to allow comparison in multi-processor mode
2713      - updated output accordingly
2714      - changed hs94.128x64x5 to use intial T from file rather than use the
2715        random number generator
2716    o add infrastructure in model routines for fizhi and gridalt packages
2717    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
2718    o changes to permit hi-res, cubed-sphere, configuration
2719      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
2720      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
2721      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
2722        of surface winds for the cube
2723      (A verification experiment, based on global_ocean.cs32x15, but with
2724       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
2725       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
2726       complete with example surface forcing files and matlab scripts to look
2727       at the output and compare it with that of global_ocean.cs32x15.)
2728    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
2729       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
2730       to conform to the common rule.
2731    o check-in the first version of the coupler + interfaces for multi-components
2732       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
2733       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
2734       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
2735       - ocean and atmos. share the same horizontal grid (no interpolation).
2736       - exchanges between component and coupler is done in forward_step
2737    o new verification experiment, cpl_aim+ocn:
2738       coupled ocean - AIM atmosphere on cs32 grid.
2739    
2740    checkpoint52d_pre
2741    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
2742    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2743    
2744    checkpoint52c_post
2745    o Fixing OPTIONS files for use of exf:
2746      - ALLOW_ECCO not needed
2747      - ECCO_CPPOPTIONS.h should not be included from
2748        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2749        as has been the case in the past
2750      - All cal/exf related options are currently set in
2751        single header file. Should remain so until we
2752        agree on a consistent new policy.
2753    o Removed all CPP options for cal package.
2754      cal has no more CPP options.
2755    o modified STOREs in GAD_ADVECTION
2756    o corrected key comp. for passkey
2757    
2758    checkpoint52b_post
2759    o new version: "thsice" of thermodynamic sea-ice pkg:
2760     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2761     - modify fluxes but do not change theta directly;
2762     - light cleaning of bulk_force pkg (still needed with thsice).
2763     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2764       + output_thsice.txt to test thsice & bulk_force pkgs.
2765    o put back grid & coriolis monitor output.
2766    checkpoint52b_pre
2767    
2768    o call "do_the_model_io" at the beginning (=> dump initial state)
2769    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2770    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2771      (need info on NUMBER_OF_PTRACERS)
2772    o missing PTRACERS headers in some routines
2773    o default tamc.h in pkg/autodiff supposed to crash
2774      to ensure proper customization
2775    
2776    checkpoint52a_post
2777    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2778      - moved surfaceTendencyTice from pkg/seaice to main code
2779      - subroutine FREEZE_SURFACE now limits only surface temperature
2780        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2781        => new output.txt for global_ocean.cs32x15 & global_with_exf
2782      - keep the old version of FREEZE for backward compatibility;
2783        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2784      - corresponding modifs for TAF directives
2785    o added surface flux output variables to TIMEAVE_STATVARS
2786    o time-averaged output for pkg/ptracers
2787    o fix problem with ECCO-related divided adjoint
2788      snapshot file was missing some ad-variables,
2789      but no warning issued by TAF
2790    
2791    checkpoint52a_pre
2792    o some bug fixes for #undef REAL4_IS_SLOW
2793    
2794    checkpoint52 = ecco_c52_e35
2795    o after testing adjoints of checkpoint51u_post
2796    
2797    checkpoint51u_post
2798    o this is the post-merge tag of the ecco-branch
2799      (needs another clean checkout and re-testing)
2800    o various natl_box_adjoint configs and results
2801      but no input fields
2802    o obcs adjoint not yet merged!
2803    o adding ECCO global 1x1 and 2x2 degree configs
2804    o updated/extended some store directives for seaice
2805    o pkg/ecco now containes ecco-specific part of cost function
2806    o top level routines the_main_loop, forward_step
2807      supersede those in model/src/
2808      previous input data.cost now in data.ecco
2809      (new namelist ecco_cost_nml)
2810    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2811    
2812    checkpoint51t_post
2813    o this is the pre-merge tag of the ecco-branch
2814    
2815    checkpoint51s_post
2816    o cleanup: removed various obsolete #define-s
2817    o pkg/grdchk
2818      - renamed 'ph-grd 3' to 'grad-res'
2819      - merged from ecco-branch
2820        (remaining bug fixes for obcs gradient checks)
2821      - additional high-precision output for testreport
2822        (grep for 'precision_grdchk_result')
2823    
2824    checkpoint51r_post
2825    o cleaned up or removed CPP_OPTIONS.h files
2826    o updated results for some of the tests to reflect the new
2827      optfiles (-ieee: -O0 instead of -O3)
2828    
2829    checkpoint51q_post
2830    o cd_code:
2831      - moved cd_scheme.F -> cd_code_scheme.F
2832      - separate read_checkpoint from cd_code_ini_vars.F
2833      - separated cd_code part from write_checkpoint
2834      - updated AD_SOURCE, generated .flow
2835      - added CD_CODE_VARS.h to the_main_loop
2836      - Moving cd_code specific store dir.s to pkg/cd_code
2837    o ctrl package totally restructured
2838      - pack/unpack now optional and decoupled from
2839        xx_/adxx_ I/O
2840      - ctrl_pack/unpack cleaned
2841        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2842      - confined inclusion of AD_CONFIG.h to where necessary.
2843    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2844    
2845    checkpoint51p_post
2846    o create initial cd_code package
2847      - WARNING: the initialization of fields within packages
2848        is broken because INI_FIELDS (where READ_CHECKPOINT is
2849        called) is called *before* PACKAGES_INIT_VARIABLES.
2850        This seems to be backwards since
2851        1) its important to initially zero the entire field including
2852           the "halo" region
2853        2) zeroing needs to be done *before* reading pickup info
2854           and the pickup call might or might not happen in any
2855           particular run
2856      - this needs an overhaul for R2
2857    o cleanup verification/*/code/GMREDI_OPTIONS.h
2858    o cleanup testreport
2859    
2860    checkpoint51o_post
2861    o bringing AD-related verif's up to date with genmake2
2862      - carbon/
2863      - global_ocean.90x40x15/
2864      - hs.94.1x64x5/
2865      - (front_relax/ )
2866    o (more) consistent directory structure for AD-related verif.'s
2867    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2868    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2869    o bug fix in find_alpha.F for MDJWF:
2870      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2871        change rho -> rho-rhoConst
2872      - replace call find_rho to find_rhonum
2873    o initialisation of rFlx extended to full array (required by TAF)
2874      and shifted to thermodynamics
2875    o removed PTRACERS.h in ptracers routine
2876    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2877    o Correcting initialisations for fVerU, fVerV.
2878    o helping TAF to recognize dependency on kUp for
2879      fVerU, fVerV
2880    o Replacing delZ by delR in pkg/ctrl/
2881    checkpoint51o_pre
2882    
2883    o undid all of cp51 pending some cleanups and discussion
2884    o added the [#include "AD_CONFIG.h"] statement to all files that need
2885       it for adjoint/tl #defines
2886     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2887     o removed tools/genmake since it no longer works
2888    
2889    checkpoint51n_post
2890    o modifications to make FREEZE flux visible to pkg/kpp
2891      - moved surfaceTendencyTice from pkg/seaice to main code
2892      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2893      - subroutine FREEZE now limits only surface temperature
2894        (this means new output.txt for global_ocean.90x40x15,
2895         global_ocean.cs32x15, and global_with_exf)
2896    o added surface flux output variables to TIMEAVE_STATVARS
2897    
2898    checkpoint51n_pre
2899    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2900    o added [#include "AD_CONFIG.h"] to all files that use the following
2901      defines:
2902      - ALLOW_ADJOINT_RUN
2903      - ALLOW_TANGENTLINEAR_RUN
2904      - ALLOW_ECCO_OPTIMIZATION
2905    
2906    checkpoint51m_post
2907    o incorporating changes to get TAMC/TAF working in genmake2
2908      - added new TAMC/TAF targets to the Makefile
2909      - various cleanups related to package handling
2910      - these changes should have no impact on the forward model
2911    
2912    checkpoint51l_post
2913    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2914     - faster algorithm for cal_addtime.F
2915     - higher precision arithmetic, where needed
2916     - pkg/exf *startdate variables changed from calendar date to
2917       model integration time
2918    
2919    checkpoint51l_pre
2920    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2921    o enable to apply restoring on S & T only in a latitude band.
2922    o update output (external_forcing_surf modif. change truncation errors)
2923       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2924    
2925    checkpoint51k_post
2926    o change default to: useNHMTerms=.FALSE.
2927     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2928       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2929     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2930        exp1, ideal_2D_oce
2931     - change data file of oceanic exp (leave the results unchanged for now)
2932       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2933    o set gravitySign automatically according to the vertical coordinate used
2934      (and change sign: back to "logical" value: +1 when R increases downward)
2935    o added an include barrier to the default CPP_OPTIONS.h and
2936      removed the #include "PACKAGES_CONFIG.h" from it
2937    o fix a bug in mom_fluxform (from chk51j_post)
2938    
2939    checkpoint51j_post
2940    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2941    o adjusted some flow directives (dynamics, thermodynamics)
2942    o added cubed-sphere case to test cost function
2943    o heckpoint_lev?_directives.h now include
2944      pkg-specific directives, whenever those are enabled.
2945    o Moving pkg-specific flow directives to corresponding pkg
2946      Moving pkg-specific differentiation list to corresponding pkg
2947      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2948      ---> conventions are
2949           - pkg_ad.flow
2950           - pkg_ad_diff.list
2951           - pkg_ad_check_lev?_dir.h
2952    
2953    checkpoint51i_post
2954    o merge of the branch-genmake2
2955      - knowingly breaks the older genmake
2956      - automatic generation of all ALLOW_${PKG_NAME} defines
2957      - new testreport supersedes older testscript
2958    o large number of package inclusion and header cleanups
2959    checkpoint51i_pre
2960    
2961    o new output for adjoin of global ocean vector invariant
2962    o fix for checkpoint of thermodynamic seaice and bulk_force
2963    o Steph gchem various cleanups
2964    
2965    checkpoint 51h_pre
2966    o fixed some single quotes
2967    o modify gchem pkg to be more versatile
2968    o modifications to clean up dic pkg
2969    o add pkg/cfc
2970    
2971    checkpoint51g_post
2972    o provide links for ARPACK and ADM*TLM
2973    o start removing verification/vero/
2974    o update AD-related stuff
2975      (in particular some IF-statements in model/src/ routines)
2976    o adding to verification/global_ocean.90x40x15/ adjoint of
2977      vector invariant setup
2978    
2979    checkpoint51f_post
2980    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2981    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2982      of tracer Green's fucntions for ocean inversion project.
2983    
2984    checkpoint51f_pre
2985    o Added on-the-fly spatial interpolation capability
2986        "USE_EXF_INTERPOLATION" to pkg/exf.
2987      - This is a temporary Cartesian-grid hack until
2988        the super-duper ESMF coupler becomes available.
2989      - See verification/global_with_exf/README for usage example.
2990      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2991        flags and modified pkg/seaice accordingly.
2992    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2993        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2994        non-local transport term.
2995    
2996    checkpoint51e_post
2997    o pkg/mom_vecinv:
2998      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2999      - add time-ave diagnostic of vorticity advection.
3000    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
3001    o atmospheric geopotential: - include water vapor effect;
3002                                - use p^kappa in p* scaling.
3003    o land pkg: read initial state from files.
3004    o AIM : add stratospheric drag in the upper level
3005    
3006    checkpoint51d_post
3007    o change function ILNBLNK (=> last non-blank char.) to return zero
3008      (instead of the string length) when the string. char is empty
3009    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
3010    o modif's to restore TAMC compatibility
3011      - avoid "_d" constructs in PARAMETER declarations
3012      - avoid interrupting lines by comment lines
3013    o Use cluster local disks for purely local I/O
3014      vs. globally visible disks needed for ctrl stuff
3015      (merged from ecco-branch)
3016      - new active_file_loc... and mdsio_..._loc routines
3017      - affected packages: autodiff, ctrl, grdchk, mdsio
3018    
3019    checkpoint51c_post
3020    o introducing integer flag debugLevel
3021      - debLevZero: suppress all output
3022      - debLevA: standard
3023      - debLevB: equivalent to current debugMode=.TRUE.
3024    o introducing pathname variable mdsioLocalDir for mdsio
3025      that can be specified at runtime
3026      (relevant for cluster I/O to local disk)
3027    `
3028    >>>checkpoint51b_post
3029    adjoint of ptracers
3030    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
3031    o extended state in checkpoint_lev?, etc.
3032    o alternative ctrl/cost with tr1 or ptracer
3033    o new comlev1_bibj_ptracers
3034    o new ptracers.flow
3035    o made ptracers_forcing same as external_forcing_s
3036    o added verification for adjoint with ptracers
3037      - adm. grdchk fail so far
3038      - tlm. grdchk OK
3039      - checked tapelev/comlev recomputations: OK
3040    <<<checkpoint51b_pre
3041    
3042    checkpoint51a_post
3043    o added code for biogeochemistry package
3044      - new pkgs: dic, gchem
3045      - new subroutine in ptracers
3046    o modify code for biogeo packages
3047      - in model/src and pkg/ptracers
3048    
3049    checkpoint51
3050    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
3051      - autodiff, ctrl, exf, grdchk, seaice
3052      kept separate packages
3053      - cost, ecco, obcs
3054    o updating verification/internal_wave, verification/lab_sea
3055      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
3056    
3057    checkpoint50i_post
3058    o Preparing next differentiable checkpoint and sync
3059      of MAIN vs. ecco-branch
3060      - 1st step: this one is differentiable
3061      - 2nd step: next(! not this) checkpoint will have updated packages
3062                  from ecco-branch)
3063    
3064    checkpoint50h_post
3065    o new package "land": provide surface BC for AIM.
3066    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
3067    o AIM: use true log-P extrapolation for near surface temp (= as in
3068        F.Molteni paper) ; update aim.5l_cs output.
3069    o New variable in PARM03 for more flexible pickups
3070    o somewhat cleaned package initialisation sequence for
3071      ctrl/ cost/ ecco/ in packages_... routines
3072    
3073    checkpoint50g_post
3074    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
3075      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
3076      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
3077        made the default because of faster convergence than ADI
3078    
3079    checkpoint50f_post
3080    o exf totally restructured
3081      - replaced all exf_set_ routines by one generic exf_set_gen.F
3082        and made sure it's still differentiable
3083      - split exf_getffields.F into new exf_bulkformulae.F
3084      - exf_inscal_/exf_outscal_ suffixes consistent with field names
3085      - updated adjoint/makefile and relevant verif. accordingly
3086    
3087    checkpoint50f_pre
3088     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
3089          + change Evap over land. (update aim.5l_cs output)
3090     o added missing .cvsignores and made uniform across expts
3091     o changed configuration of tidal_basin_2d expt
3092     o added pkg/debug functions for tracing code in fatal crashes
3093     o tidied pkg/monitor to use MONITOR_OPTIONS.h
3094     o new fn in pkg/monitor to stop model if solution grows too big
3095     o removed lots of single quotes from comments
3096    
3097    checkpoint50e_post
3098    o make KPP work with PTRACERS
3099     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
3100       nearly a copy of kpp_transport_s
3101     - there is no analogue to SurfaceTendencyS, so I have to use
3102       gPtr(of the surface layer) instead
3103    o add a new platform SunFire+mpi (SunFire 15000) to genmake
3104    checkpoint50e_pre
3105    
3106    checkpoint50d_post
3107    o change kpp output from multiple-record state files to single-record state
3108      files analogous to write_state.F
3109    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
3110      analogous to the cg2d-related output.
3111    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
3112      so that writing to internal file fn (with length 512) fails.
3113    checkpoint50d_pre
3114    
3115    checkpoint50c_post
3116    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
3117    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
3118    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
3119    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
3120    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
3121    
3122    checkpoint50c_pre
3123    Merging from release1_p13:
3124    o bug fix for pkg/seaice dynamic solver
3125    o Added SEAICE_initialHEFF to pkg/seaice
3126    
3127    checkpoint50b_post
3128    o store u*,v* in gU,V instead of in guNm1,gvNm1
3129    o in order to put the momForcing out of the Adams-Bashforth:
3130      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
3131      to timestep.F
3132    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
3133    o re-generate output for highly sensitive test-exp:
3134       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
3135    
3136    checkpoint50b_pre
3137    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
3138    o corrected CPP option mismatch in exf_Bulk... functions for case
3139      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
3140    
3141    checkpoint50a_post
3142    o Bug fix for merging between c50 and KPP.
3143      ikey was passed from thermodynamics to kpp_calc via
3144      common block rather than being recomputed in kpp_calc,
3145      in contradiction with new key itdkey.
3146      New key ikppkey created, and tamc.h headers updated.
3147    
3148    checkpoint50
3149    - 2nd step of merge with ecco-branch:
3150      merge changes in ecco-branch back into main trunk
3151    - bug fix in find_alpha
3152    - more storing in gmredi_calc_tensor.F, kpp_routines.F
3153    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
3154    - merged some sliced AD support routines
3155    
3156    checkpoint49
3157    merged from ecco-branch:
3158    o exf:
3159      - Enable initialisation of forcing fields to constant
3160        (runtime) values.
3161      - in exf_getffields.F
3162        Reduce i-/j-loop to interior domain, discarding overlaps.
3163        That also fixes wrong TAF-key computations for key_1, key_2
3164        with bulf formulae.
3165      - exf_init.F modify #ifdef for exf_init_evap
3166      - exf_getffieldrec.F, ctrl_getrec.F
3167        The following INT-usages are not safe:
3168          fldsecs  = int(fldsecs/fldperiod)*fldperiod
3169          fldcount = int(fldsecs/fldperiod) + 1
3170        and were modified.
3171    o autodiff: checkpoint_lev...
3172      - updated storing for bulk formulae (some arrays were missing)
3173      - added state for seaice package
3174      - synchronized with main branch
3175    o DIVA:
3176      Modif.s in
3177      - the_main_loop.F
3178      - the_model_main.F
3179      and added cost_final_restore.F cost_final_store.F
3180      o With these changes, it is possible to fully separate
3181        the first forward run to compute the cost function (mdthe_main_loop)
3182        and adjoint runs over individual DIVA intervals (adthe_main_loop)
3183        into separate model executions.
3184        This enables better tuning of DIVA to given queue sizes.
3185      o Loss of cost function value in consecutive DIVA runs is
3186        fixed by storing to 'costfinal' file.
3187      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
3188        beginning/end of adjoint integration is accounted for.
3189      The current changes apply to TAF-1.4.26.
3190      TAF has one remaining bug, requiring one manual change
3191      (see MITgcm manual).
3192    o cal: synchronized between MAIN and ecco-branch
3193    
3194    checkpoint48i_post
3195    o Changes to restore differentiability of code w.r.t. previous tag
3196      (mostly adding new routines to make list and replacing
3197      pressure by totPhiHyd).
3198    o Updated and merged grdchk package
3199      - has both ADM and TLM checks
3200      - works for single- and multi-proc.
3201      - output cleaned
3202      - worked successfully for parallel DIVA
3203    o genmake:
3204      - Adding -platform=SP4
3205      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
3206    o Modif. for DIVA:
3207      ctrl_unpack should not be called in intermediate DIVA interval.
3208      (similar thing would apply for active files such as
3209      tbar, sbar, psbar, which should not be reinitialised;
3210      only relevant for ecco-branch)
3211    
3212    checkpoint48h_post
3213    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
3214    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
3215    o Added SEAICE_initialHEFF to pkg/seaice
3216    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
3217    
3218    checkpoint48g_post
3219    --- EOS:
3220    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
3221      store total Potential in totPhyHyd for diagnostics & EOS.
3222    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
3223    --- Pressure/geopotential gradient:
3224    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
3225    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
3226      ( changes results of global_ocean_pressure )
3227    o NLFS + z-coord.: add eta*Rho' contribution.
3228    o accurate phiHyd when using interface-W at the middle between 2 centers
3229     ( changes results of ideal_2D_oce )
3230    o includes r* 2nd term in potential gradient.
3231    
3232    checkpoint48f_post
3233    Merging from release1_p12:
3234    o Modifications for using pkg/exf with pkg/seaice
3235      - improved description of the various forcing configurations
3236      - added basic radiation bulk formulae to pkg/exf
3237      - units/sign fix for evap computation in exf_getffields.F
3238      - updated verification/global_with_exf/results/output.txt
3239    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
3240      (SBO) core products, including oceanic mass, center-of-mass,
3241      angular, and bottom pressure (see pkg/sbo/README.sbo).
3242    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
3243      to avoid negative values in shallow regions.
3244      - updated verification/natl_box/results/output.txt
3245      - updated verification/lab_sea/results/output.txt
3246    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
3247    o Added useSingleCpuIO option (see PARAMS.h).
3248    o Updated useSingleCpuIO option in mdsio_writefield.F to
3249      work with multi-field files, e.g., for single-file pickup.
3250    o pkg/seaice:
3251      - bug fix in growth.F: QNET for no shortwave case
3252      - added HeffFile for specifying initial sea-ice thickness
3253      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
3254    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
3255      kpp_transport_t.F, forward_step.F, and the_main_loop.F
3256    o pkg/seaice:
3257      - adjoint-friendly modifications
3258      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
3259    
3260    checkpoint48e_post
3261    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
3262    o dynamics: change definition of computational domain & adapt mom_fluxform
3263      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
3264    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
3265        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
3266        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
3267        global_ocean.90x40x15 global_with_exf global_ocean_pressure
3268        inverted_barometer solid-body.cs-32x32x1
3269      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
3270    
3271    checkpoint48d_post
3272    o in preparation for r*:
3273     a) use pre-computed gradient of hydrostatic potential:
3274        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
3275     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
3276        => affects results of glob_oce_pressure (different truncation error)  
3277      update output.txt of ideal_2D_oce & global_ocean_pressure
3278    
3279    checkpoint48d_pre
3280    o in preparation for r*:
3281      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
3282      pass the 2 comp. of the grad. as arguments to momentum S/R.
3283      but for the moment, only used if it does not change the results.
3284    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
3285    
3286    checkpoint48c_post
3287    Modifications in treatment of initial flux forcing controls
3288    to avoid extra storing of flux fields.
3289    
3290    checkpoint48c_pre
3291    o Added tidal_basin_2d experiment (currently 1D!)
3292    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
3293    
3294    checkpoint48b_post
3295    o r* coordinate added in #ifdef NONLIN_FRSURF block.
3296     (modification to pressure gradient not yet implemented)
3297    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
3298      (for U & V) that are used for vertical advection of momentum.
3299    
3300    checkpoint48a_post
3301    o In preparation for r*, use temp. array to compute vertical transport
3302       in flux-form momentum pkg. => change results of few test-exp.
3303      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
3304                        lab_sea, natl_box & plume_on_slope
3305    
3306    checkpoint48
3307    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
3308    
3309    checkpoint47j_post
3310    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
3311    o moved adexch from forward_step to addummy_in_stepping
3312    o added exch in ctrl_map_...
3313    o aveFreq.=0. at end of cost_final to avoid overwrite in
3314      reverse checkpointing loop
3315    o Yet more changes in gmredi:
3316      * adgmredi_calc_tensor
3317        avoiding all recomputation of gmredi_slope_limit
3318      * adgmredi_x/y/rtransport
3319        added flag for excessive storing to avoid recomp. of
3320        u/v/rtans, dTdx/y/z
3321        -> this is not really necessary and very memory-consuming
3322      * adgmredi_slope_psi:
3323        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
3324      * gmredi_slope_limit
3325        re-activated full calculation of taperfct for case 'ac02'
3326    o updating verification/ adjoints of carbon, global_ocean.90x40x15
3327    
3328    checkpoint47i_post
3329    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
3330    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
3331      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
3332    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
3333    o gmredi: fix few bugs.
3334    
3335    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
3336    This will be a good checkpoint to plug into the ecco-branch.
3337    o few modif.'s to get latest version adjointed
3338      (mainly kick out code in ini_linear_phisurf)
3339    o modif's to run adjoint with exactConserv
3340    o case GM_BOLUS_ADVEC should be cleaned
3341      S/R gmredi_slope_psi should be cleaned
3342    o verification/carbon now has exactConserv=.TRUE.
3343    
3344    checkpoint47g_post
3345    o time-average AIM output: becomes independent from statvars time-average
3346      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
3347    o After TAF bug fix:
3348      Tested adjoint of gmredi package.
3349      Tests were done with checkpoint47 rather than with latest
3350      checkpoint47f_post since the latter is broken for the adjoint
3351      verification/carbon/ contains both ADM and TLM gradient checks.
3352    Here they are, before they get changed/lost/stolen.
3353    Mostly modif.'s to fix numerical sensitivities.
3354    Gradient checks OK for
3355    - GM_taper_scheme:
3356      * clipping
3357      * ac02
3358      * linear
3359      * glw91
3360      * dm95
3361      * ldd97
3362    - GMREDI_OPTIONS:
3363      * GM_VISBECK_VARIABLE_K
3364      * GM_NON_UNITY_DIAGONAL
3365      * GM_EXTRA_DIAGONAL
3366      * GM_BOLUS_ADVEC
3367    in conjunction with data.gmredi parameters to be checked in
3368    in a few minutes under verification/carbon/code/
3369    
3370    checkpoint47f_post
3371    Merging from release1_p10:
3372    o modifications for using pkg/exf with pkg/seaice
3373      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
3374        and SEAICE_EXTERNAL_FLUXES
3375      - pkg/exf CPP options EXF_READ_EVAP and
3376        EXF_NO_BULK_COMPUTATIONS
3377      - usage examples are Experiments 8 and 9 in
3378        verification/lab_sea/README
3379      - verification/lab_sea default experiment now uses
3380        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
3381    
3382    checkpoint47e_post
3383    o created a tag prior to creating a branch
3384    
3385    checkpoint47d_post
3386    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
3387      at the bottom boundary had an erroneous half slip boundary condition
3388    o added bottom drag and no slip boundary condition capabilities to
3389      oceanic pressure coordinates code
3390    o added new verification experiment global_ocean_pressure, this experiment is
3391      also described in the tutorial section of the manual
3392    checkpoint47d_pre
3393    
3394    checkpoint47c_post
3395    o Added a verification experiment for a global cubed-sphere ocean run
3396      -  verification/global_ocean.cubed32x32x30
3397      -  uses pkg/therm_seaice and pkg/bulk_forcing
3398    
3399    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
3400    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
3401      when using P-coordinate; only implemented for atmospheric config.
3402    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
3403      NOTES: requires option NONLIN_FRSURF to be "#define".
3404    o update advect_xz/results/output.txt (left from checkpoint44g_post)
3405    
3406    checkpoint47b_post
3407    Merging from release1_p9:
3408    o pkg/seaice
3409      - removed GOTO's and added taf directives
3410      - double precision constants to reduce the g77 (Linux)
3411        to F77 (SGI) differences reported in release1_p8
3412    o tools/genmake
3413      - added SGI options
3414    o verification/testscript
3415      - updated to that of checkpoint47a_post
3416    o verification/global_ocean.90x40x15/input/eedata
3417      - modified for SGI f77 compatibility
3418    o verification/lab_sea
3419      - added description of sea-ice model
3420      - added missing matlab routines
3421      - added test of thermodynamics parallelization
3422    
3423    checkpoint47a_post
3424    o new pkg: aim_v23
3425     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
3426       for now, keep the same surface forcing as before.
3427     - Part-Cell implemented into AIM; check that Heat & Water are conserved
3428     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
3429     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
3430    o add diagnostic of surface correction term in monitor output
3431    
3432    o bulk_force and therm_seaice
3433    - Two packages:  bulk_force (Bulk forcing)
3434      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
3435    - Earlier integration from Stephaine Dutkiewicz
3436      and Patrick Heimbach.
3437    - Two ifdef statements for compile time,
3438       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
3439    
3440    checkpoint47
3441    differentiable version of checkpoint46n_post
3442    o bug fix in quasihydrostaticterms
3443    o * "clean" adjoint code (in terms of extensive recomputations)
3444        can now be obtained for all GMREDI options (i.e. for
3445        - GM_VISBECK_VARIABLE_K
3446        - GM_NON_UNITY_DIAGONAL
3447        - GM_EXTRA_DIAGONAL
3448        - GM_BOLUS_ADVEC )
3449      * However, wrong gradient check problem remains unsolved.
3450      * New CPP options have been introduced for different
3451        tapering schemes
3452    o external_fields_load now part of differentiation list
3453    o pressure needs multiple storing;
3454      would be nice to have store_pressure at beginning or
3455      end of forward_step, e.g. by having phiHyd global (5-dim.)
3456      (NB: pressure is needed for certain cases in find_rho,
3457      which is also invoked through convective_adjustment).
3458    o recomputations in find_rho for cases
3459     'JMD95'/'UNESCO' or 'MDJWF' are OK.
3460    o #define ATMOSPHERIC_LOADING should be differentiable
3461    o ini_forcing shifted to begining of initialise_varia
3462    o Incorporating QNVS line search routines into MITgcm
3463      (this is separate code, and therefore not under pkg)
3464      lsopt/, optim/
3465    o Updated verification/carbon/
3466      - #define GM_VISBECK_VARIABLE_K
3467      - GM_taper_scheme    = 'ldd97'    
3468    
3469    checkpoint46n_post
3470    Merging from release1_p8:
3471    o verification/natl_box:
3472      updating new external_fields_load routine
3473    o New package: pkg/seaice
3474      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
3475      The sea-ice code is based on Hibler (1979-1980).
3476      Two sea-ice dynamic solvers, ADI and LSR, are included.
3477      In addition to computing prognostic sea-ice variables and diagnosing
3478      the forcing/external data fields that drive the ocean model,
3479      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
3480      The implied surface heat flux is then stored in variable
3481      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
3482      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
3483      non-local transport term.  Because this call precedes model
3484      thermodynamics, temperature under sea-ice may not be "exactly" at
3485      the freezing point by the time theta is dumped or time-averaged.
3486      N.B.: fairly large differences in accuracy occur across
3487            different platforms/compilers; comparison between
3488            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
3489            generated output gives:
3490       T           S           U           V
3491      C D M    c        m  s        m  s        m  s        m  s
3492      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
3493      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
3494      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
3495    
3496      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
3497    o GAD:
3498      - generated new common blocks to account for call of
3499        same gad routines with differing traceridentities
3500        (needed to modify tracerIdentity indices in GAD.h)
3501      - generated separate common blocks for case useCubedSphereExchange
3502        (Department of Futurology)
3503      - parameter lists to gmredi_?transport: added tracerIdentity
3504      - added new key indices to tamc.h
3505    o external_fields_load:
3506      - added this routine to TAF list
3507      - needed to make some common blocks global and additional storing
3508        along the same lines as exf package (checkpoint_lev?_directives.h)
3509    o exf:
3510      updated external forcing package
3511      - bug fixes carried over from ecco-branch
3512        (missing OBCS_OPTIONS.h in two routines)
3513      - enable easy to use "no forcing".
3514      - added exf I/O for atmospheric loading
3515      - added exf I/O for runoff data
3516      - transfered scaling between exf <-> MITgcm to exf namelist
3517    o Adding new verification experiment global_with_exf.
3518      This verification experiment is almost identical to the
3519      global_ocean.90x40x15 experiment, except that it uses
3520      the exf (and cal) package instead of the
3521      external_fields_load routine (cf README file).
3522    
3523    checkpoint46m_post
3524    o modified testscript to return -- when there are no lines of "%MON" output
3525    o added new flag "quasiHydrostatic" for QH mode
3526      and new routine quasihydrostaticterms()
3527    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
3528      New routine: mom_u_coriolis_nh()
3529    o fixed sign of non-hydrostatic metric terms in u and v equations.
3530      Depend on correct sign of gravitySign.
3531    o added work.pc* to .cvsignore in aim directories using ifc
3532    o introduced flag for controllin non-hydrostatic metric terms
3533    o removed gravitySign from PARM04
3534    o switched to g77/ifc from pgf77 in aim experiments
3535    
3536    checkpoint46l_post
3537    o made convective adjustment work with pressure coordinates:
3538     - changed the direction of k-loop in convective_adjustment.F for the
3539       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
3540     - adjusted the reference pressure k-index in convective_adjustment.F
3541     - adjusted the convection condition in convect.F (in analogy to
3542       calc_ivdc.F)
3543     - convective_adjustment no longer computes anything on the halos
3544     - removed the warnings about negative salinity from find_rho.F and
3545       find_alpha.F; instead the new routine look_for_neg_salinity, called
3546       at the beginning of find_rho, find_alpha, and find_beta, does a
3547       check of the entire slice, if CPP-option
3548       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
3549    checkpoint46l_pre
3550    
3551    checkpoint46k_post
3552    o fixed the verification/global_ocean.90x40x15 experiment:
3553     - new bathymetry (the world according to A., JMC, and M.)
3554     - new initial fields and forcing fields (*.bin files)
3555     - new POLY3.COEFFS (for the next release one should switch to a full
3556       equation of state: JMD95P or MDJWF)
3557     - fixed several errors and redundancies in the data file
3558     - experiment uses looped cells
3559     - added matlab directory with diagnostic scripts for plotting of output
3560    
3561    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
3562     - read AIM physics parameters from a file (data.aimphys)
3563     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
3564    
3565    checkpoint46j_post
3566    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
3567    o move wVel computation at the end of the time step, in S/R integr_continuity
3568    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
3569    o update timeave pkg for wVel diagnostic.
3570    checkpoint46j_pre
3571    
3572    checkpoint46i_post
3573    o Clean up AIM package (and keep the results unchanged):
3574      include CPP_OPTION and use IMPLICT NONE in all routines ;
3575      declare all the variables _RL ; use _d 0 for all numerical constants.
3576      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
3577    
3578    checkpoint46h_post
3579    o cleaned up the use of rhoNil and rhoConst.
3580      - rhoNil should only appear in the LINEAR equation of state, everywhere
3581        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
3582        and the dynamical equations are all divided by rhoConst
3583    o introduced new parameter rhoConstFresh, a reference density of fresh
3584      water, to remove the fresh water flux's dependence on rhoNil. The default
3585      value is 999.8 kg/m^3
3586    o cleanup up external_forcing.F and external_forcing_surf.F
3587      - can now be used by both OCEANIC and OCEANICP
3588    checkpoint46h_pre
3589    
3590     Added code to convert surface volume flux (fresh water) into
3591     a mass flux when using P coordinates in the ocean (OCEANICP).
3592     Note: It assumes you have set rho0=rhoConst=density of fresh water.
3593    
3594    checkpoint46g_post
3595    o Include a new diagnostic variable phiHydLow for the ocean model
3596      - in z-coordinates, it is the bottom pressure anomaly
3597      - in p-coordinates, it is the sea surface elevation
3598      - in both cases, these variable have global drift, reflecting the mass
3599        drift in z-coordinates and the volume drift in p-coordinates
3600      - included time averaging for phiHydLow, be aware of the drift!
3601    o depth-dependent computation of Bo_surf for pressure coordinates
3602      in the ocean (buoyancyRelation='OCEANICP')
3603      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
3604        Theta, Salinity, and Pressure in the parameter list. This routine is
3605        presently contained in find_rho.F. This routine does not give the
3606        correct density for 'POLY3', which would be a z-dependent reference
3607        density.
3608    o cleaned up find_rho
3609      - removed obsolete 'eqn' from the parameter list.
3610    o added two new verification experiments: gop and goz
3611      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
3612    checkpoint46g_pre
3613    
3614    checkpoint46f_post
3615    o Enable tangent linear (forward mode) gradient checks:
3616      - extended active file handling to g_... files
3617      - added TANGENT_SIMULATION to theSimulationMode
3618      - extended grdchk package accordingly
3619    o added tangent linear setup in verification/carbon/code_ftl
3620    o added adjoint setup in verification/front_relax/code_ad
3621    
3622    checkpoint46e_post
3623    o Added new equation of state -> MDJWF
3624      - EOS of McDougall et al., 2002, JAOT, submitted
3625      - caveat: the equation of state is only valid for a smaller (more
3626        realistic?) range of values than JMD95P/Z and UNESCO
3627      - added masks to the calculation of pressure in store_pressure
3628      - added more check values for density in check_eos (ini_eos.F), some of
3629        the old check values are out of the range of the MDJWF-eos, so don't
3630        expect perfect matches for those
3631    checkpoint46e_pre
3632    
3633    checkpoint46d_post
3634    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
3635      'OCEANICP', also initialised field pressure correctly in ini_eos in the
3636      case of pressure coordinates. eosType='JMD95Z' in
3637      combination with buoyancyRelation='OCEANICP' now causes an error.
3638    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3639      in find_alpha/beta.
3640    checkpoint46d_pre
3641    
3642    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3643      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
3644    
3645    checkpoint46c_post
3646    o Changes necessary for ocean in p-coordinates
3647     -  Added new buoyancy relation = 'OCEANICP'
3648     -  Added new parameters = gravitySign (this used to be contained inside
3649        the factor dRdZ which I added when we first switched to R coordinates).
3650     X GM/Redi is not compatible (yet)
3651     X bottom drag and no-slip need to be debugged.
3652    checkpoint46c_pre
3653    
3654    checkpoint46b_post
3655    o Added new equation of state -> JMD95Z and JMD95P
3656      - EOS of Jackett and McDougall, 1995, JAOT
3657      - moved all EOS parameters into EOS.h
3658      - new routines ini_eos.F, store_pressure.F
3659    o Added UNESCO EOS, but not recommended because it requires
3660      in-situ temperature (see JMD95)
3661    o Modified formatting for knudsen2.f in utils/knudsen2 and added
3662      unesco.f to be used with POLY3
3663    checkpoint46b_pre
3664    
3665    checkpoint46a_post
3666    o Added (atmospheric) pressure loading
3667      - new field in FFIELDS.h, etc...
3668      - new cpp flag ATMOSPHERIC_LOADING
3669    o Changed hFacC to _hFacC in calc_phi_hyd.F
3670    o Added SHORTWAVE_HEATING to some files for consistency
3671    checkpoint46a_pre
3672    
3673    checkpoint46
3674    further merges from release1_p5
3675    o new ctrl package
3676      - adopted from ECCO environment to enable optimization
3677      - added Eliassen Palm fluxes to controls
3678    o added Eliassen Palm flux controls to gradient check package
3679    o cost package
3680      - Compatible with new ctrl package
3681      - added Eliassen Palm cost hooks
3682      - modif's of existing cost functions
3683    o Adjoint-related bug fixes in kpp:
3684      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
3685      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
3686    o autodiff package
3687      - flow directives:
3688        + new for S/R do_the_model_io
3689        + enhanced for S/R checkpoint
3690        + new gmredi.flow
3691      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
3692        disable adcommon.h/g_common.h by default.
3693      - fixed problem for adjoint of global_max
3694    o modified verification/carbon/
3695    o New setup for adjoint of global_ocean
3696    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
3697    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
3698    o incorporated hooks for sponge layer code (external_forcing.F)
3699    
3700    checkpoint45d_post
3701    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
3702    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
3703      (affects plume_on_slope "cg2d" output)
3704    o add new parameter deltaTfreesurf for free-surface time stepping
3705    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
3706    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
3707    o change phiMin in exp1 (to agree with documentation)
3708    o add new flags:
3709     - T,S forcing inside/outside Adams-Bashforth
3710     - turn off temp,salt advection and/or forcing
3711     - for each tracer, define internal flag for multiDimAdvection & A-B
3712    o monitor: change definition of KE to check conservation of Energy
3713    
3714    checkpoint45c_post
3715    o Removed f90 comments ("!")
3716    o Modified initialisations to enable exf package for MITgcm
3717      (without invoking ECCO_PACKAGE).
3718    o modifications to gradient check package (Martin Losch)
3719      - enable centered differences
3720      - modified format of standard output
3721    
3722    checkpoint45b_post
3723    o cleaned exchange calls in cg2d
3724    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
3725    o included CPP option SINGLE_LAYER_MODE in thermodynamics
3726      to configure barotropic setup (Martin Losch)
3727    o moved some initialisations within bi,bj loop in dynamics
3728      (TAF flow dependency)
3729    o in initialise_varia, moved call packages_init_variables
3730      before convective_adjustment_init
3731      (corresponding adjustment of TAF tape initialisation).
3732    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
3733    
3734    checkpoint45a_post
3735    o compute Rho over the whole domain (extend iMin,jMin indices)
3736    o specific exchange for X-slice domain (case Ny=1)
3737    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
3738    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
3739    
3740    checkpoint44h_post = checkpoint45
3741    o Fix to restore differentiability:
3742      place at which packages_init_variables is called in
3743      initialise_varia is crucial for reverse control flow.
3744    o modifications in GMRedi to enable stable adjoint
3745      (corresponding modif's in thermodynamics, dynamics)
3746    o added missing hook for sponge layer code in external_forcing
3747    o modified test cost functions
3748    o storing in gad_advection (plus removal of write(0,*)!
3749    o missing headers TR1.h added in convective_adjustment routines
3750    o errorMessageUnit set non-equal zero in eeboot
3751      (conflict on some platforms, e.g. IBM SP3)
3752    o modified carbon verif.
3753    
3754    checkpoint44h_pre
3755    o vertical grid option: allow to put the Interface at the middle between
3756      2 cell-centers ; replace delZ in pkg/kpp by drF.
3757    o GM Advective form: Tracers are advected using the residual transport (=
3758      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3759    
3760    checkpoint44g_post
3761    o fix surface correction term in multiDimAdvection (affects plume_on_slope
3762      results) ; ifdef missing in thermodynamics.F
3763    
3764    checkpoint44f_pre,checkpoint44f_post
3765    o added PTRACERS package
3766      This allows an arbitrary number of passive tracers to be integrated
3767      forward simultaneously with the dynamicaly model.
3768      + Implemented so far:
3769        - basic forward algorithm (time-stepping, advection, diffusion, convection)
3770        - I/O and checkpointing
3771        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
3772      + Not implemented so far:
3773        - KPP
3774        - OBCS
3775      + No specific example supplied (yet) but global_ocean.90x40x15 has the
3776        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
3777        line in data.pkg.
3778      + This package is disabled by default since it increases storage.
3779    
3780    
3781    o testscript: added -cleanup option
3782    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
3783                 b) enable to filter 2D fields.
3784    
3785    checkpoint44e_pre,post
3786    o re-wrote convective adjustment to use pre-calculated weights
3787      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3788      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3789      Original calls to convect() still in place.
3790    
3791    chkpt44d_pre,post
3792    o added missing EXCLUDE_MONITOR flags
3793    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3794      (incompatible typ in MIN/MAX expressions caused problems
3795      on IBM SP3)
3796    o in genmake added variable MAKEDEPEND
3797      plus resetting for case SunOS
3798    o added timer_stats.c routine for IBM SP3
3799    o removed variables in dynamics
3800    !!! I forgot to create tag chkpt44d_pre !!!
3801    !!! But chkpt44d_pre = chkpt44c_post    !!!
3802    
3803    o real fresh water flux implemented with non-linear free-surface.
3804    
3805    chkpt44c_pre,post
3806    o few fix (mask in shap_s2, EmPmR in external_field_load,
3807      USE_NATURAL_BCS in solve_for_P);
3808    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
3809    
3810    checkpoint44b_pre/_post
3811    o merge of relevant stuff from the ecco-branch:
3812      - genmake: removed $S64 overwrite for case SunOS
3813      - pkg/exf: update and corrections for field swapping and obcs
3814      - pkg/ecco: parameter lists for the_model_main, the_main_loop
3815                  harmonized between ECCO and MITgcm
3816      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
3817                      updated checkpointing_lev... lists for obcs
3818      - model/src: minor changes in forward_step, plot_field
3819                   added directive for divided adjoint in the_main_loop
3820      - pkg/mdsio: added mdsio_gl_slice
3821    
3822    o check parameters & config (chkpt44a_pre,post)
3823    o OBC and NonLin_FrSurf.
3824    
3825    checkpoint44
3826    o fix bug in mom_vi_del2uv
3827    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
3828    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
3829    o update AIM experiments (NCEP input files)
3830    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
3831    o added some stuff for AD
3832    
3833    checkpoint43
3834    o added two new advection tests
3835    o added global 4x4 degree ocean test
3836    o added test of H&S94 with free surface on cube
3837    o some final mods for gradient check, adjoint,...
3838    
3839    checkpoint42
3840      Fixed AD-related problems:
3841    o Store directives up-to-date with re-arranged Adams-Bashforth
3842      (mainly thermodynamics.F)
3843    o New store directives for multi-dim. advection schemes
3844      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
3845      * new common block and key passkey
3846      (mainly gad_advection.F)
3847    o Modified store directives for split of dynamics/thermodynamics
3848      for the case ALLOW_KPP
3849    o Cleaned argument list for timestep_tracer.F
3850    
3851    checkpoint41
3852    o re-formatted/added comments in prologues of key subroutines
3853      to work with protex
3854    
3855    checkpoint40
3856    o moved calc_gs, calc_gt and calc_tr1 back to model/src
3857    o added FLT (floats) package from Arne along with demo. experiment
3858    o re-arranged Adams-Bashforth scheme for tracers to allow easier
3859      implementation of forward-in-time forcing terms
3860    o more mods for non-linear free-surface including new variable
3861    o modified multi-dim method to work on cube
3862    o bug fix in KPP (from DM)
3863    
3864    checkpoint40pre9
3865    o added DST advection schemes
3866    o fix MPI bug on SGI's
3867    o modifications for non-linear free-surface
3868    o fixed conditionals for fixed flow/passive tracer only mode
3869    o added tension/strain form of stress tensor
3870    o changes to commenting of arguments for TAF/TAMC
3871    o added/updated many matlab scripts
3872    o added multi-dimensional advection method for tracers
3873      
3874    checkpoint40pre8
3875    o new package rw/
3876      Added method for dumping intermediate local arrays:
3877      mdsio_writetile - same as mdsio_writefield except works from inside
3878                        bi,bj loop
3879      mdsio_writelocal - same as mdsio_writetile except works for local
3880                         arrays
3881      write_local_r? - higher-level wrapper for mdsio_writelocal
3882      Controlled by diagFreq. Defaults to zero (ie. no dumps)
3883      Example given at end of mom_vecinv.F that dumps some local arrays.
3884    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
3885      control flux-form versus vector invariant code.
3886      Switch is runtime flag vectorInvariantMomentum (defaults to false)
3887      or genmake -DISABLE ...
3888    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
3889      (additional storing is now needed for case vecinv;
3890      currently nothing implemented to switch this storing off
3891      in case fluxform is used since no CPP flag available).
3892    
3893    checkpoint40pre7
3894    o bug fix in dynamics.F
3895      calc_viscosity called before k=1,Nr loop.
3896    o added some #ifdef's ALLOW_PASSIVE_TRACER
3897    o cleaned initialisations in ctrl_map_ini
3898      related to TAF
3899    
3900    checkpoint40pre6
3901    o split dynamics into thermodynamics & dynamics
3902    o corresponding split of calc_diffusivity into
3903      calc_diffusivity, calc_viscosity
3904      (kpp_calc_diff, kpp_calc_visc).
3905    o Added diffkr, kapgm to control variables
3906    o bug fix in gmredi_slope_limit for ldd97
3907    
3908    checkpoint40pre5
3909    o proper initialization of Adams-Bashforth time stepping
3910      + uses forward step for very first step of model (iter=0)
3911    o re-generated *all* output since almost all output is modified by this
3912      change (sorry but we've been putting this one off for about 2 years)
3913      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
3914        *not* regenerated since they are already out of date and I don't
3915        want to create the impression that they are suddenly working.
3916    o removed KAP stuff for DEC's
3917    o modified/added many .cvsignore files in */code and */input
3918    o added new expt "solid-body.cs-32x32x1"
3919      + this uses an alternative form of ini_curvilinear_grid.F which
3920        is not necessarily any better than the current one...
3921    
3922    checkpoint40pre4
3923    o added re-initialisations of utrans,vtrans,rtrans in
3924      calc_common_factors which are crucial for TAF.
3925    o extended iMin,jMin range for calc_common_factors,
3926      calc_diffusivity
3927    o added option ALLOW_PASSIVE_TRACER
3928    o a few minor updates and fixes
3929    
3930    checkpoint40pre3
3931    o created calc_gtr1.F for gad package
3932    o split the_main_loop and re-introduced forward_step
3933    o some recomputations of nIter0 for TAMC
3934    
3935    checkpoint40pre2
3936    o Updated to latest branch of AJA, JMC
3937    o Added gradient check package
3938    o Added routines for passive tracer handling
3939    o Added carbon sequestration sensitivity experiment
3940    
3941    checkpoint39
3942     o Modifications and fixes to support TAMC
3943       (mainly missing or wrong directives)
3944     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3945       in addummy_in_stepping
3946     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3947     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3948     o Included following packages:
3949       cal: calendar
3950       exf: external forcing
3951       ecco: essential routines to control use of cal, exf
3952             (NB: this is not the full ECCO environment)
3953     o disabled some packages by default in genmake
3954    
3955    checkpoint38
3956     o see notes_c37_adj.txt
3957     o corrected wrong layer index in external_forcing_t
3958     o replaced the_main_loop/forward_step by the_main_loop
3959     o removed forceoutput from write_state
3960       (replaced criteria for initial/final state)
3961     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
3962    
3963    checkpoint37
3964     o mdsio.F routine split and packaged in pkg/mdsio
3965       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
3966        used unless genmake -disable=mdsio)
3967     o allow a more precise surface-geopotential gradient for the atmosphere
3968       taking into account the change in space of Alpha (=1/rho) at the surface.
3969     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
3970       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
3971     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
3972       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
3973       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
3974     o Time-Average diagnostics defined as a pseudo package "timeave".
3975     o pickup files : old pickup (before c35) did not work with new code (c35
3976       and after) unless activating 2 commented lines in initialise-varia.
3977     o Non-Hydrostatic pickup file Pb fixed.
3978     o bug with Rigid-lid version (since c35) fixed.  
3979    
3980    checkpoint36
3981     o implement Crank-Nickelson barotropic time-stepping
3982     o recover Time-Average diagnostics
3983     o fix Pb in checkpoint (PR#19)
3984     o AIM become a standard package ; clean unused CPP_kees
3985    
3986    checkpoint35
3987     o subtantial rewrite of dynamics.f
3988     o allows staggered time-stepping
3989     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
3990     o added bottom drag (linear + quadratic)
3991    
3992    checkpoint34
3993     o Modified exchange routines for correct reverse simulation.
3994     o Added verification output to comply with bug fix in impldiff.F
3995       as of c33 (exp2, natl_box).
3996     o Corrected store directives in dynamics.F
3997     o Corrected array boundaries in impldiff.F
3998     o Corrected array dimensions in gmredi.
3999       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
4000     o Added routine GLOBAL_SUM_INT to global_sum.F
4001     o Added mdsio_gl.F for ECCO purposes.
4002    
4003    checkpoint33
4004     o Fixed bug in lower BC in impldiff.F
4005     o Fixed confusion about units of forcing arrays in FFIELDS.h
4006       namely Fu,Fv,Qnet,Qsw,EmPmR:
4007       - Removed verification/natl_box/code/external_fields_scale.F
4008         (did not differ from that in model/src)
4009       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
4010         (see FFIELDS.h for description)
4011       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
4012         kpp_calc.F and kpp_transport_t.F
4013       - Removed model/src/external_fields_scale.F and calls to it
4014       - verification/natl_box uses flux data with "atmospheric" sign so
4015         a special version of external_fields_load.F is used to
4016         change the data as it's read in. This way, the arrays
4017         have the right units and signs at all times tha a user could
4018         possibly use them.
4019     o Corrected genmake to delete a temporary file during configuration
4020    
4021    checkpoint32
4022     o Scaling of forcing fields moved from external_forcing.F to
4023       external_fields_scale.F, called directly after loading fields.
4024     o Surface relaxation terms added to surface tendency fields in
4025       extra subroutine.
4026     o impldiff.F changed to avoid storing by TAMC of huge intermediate
4027       fields.
4028     o Changes in GMRedi to comply with packaging structure.
4029     o Modifications and bug fixes in KPP package.
4030     o Verification experiment for KPP added (verification/nat_box/)
4031    
4032    checkpoint31
4033     o Packages interface brought in line with defined standard
4034       -> new routines packages_...F
4035       -> changes in initialise_fixed.F, initialise_varia.F
4036       -> enables initialisation interface for ECCO package
4037     o Rescaling of external forcing fields immediately after read
4038       (removed from external_forcing.F)
4039       -> new: surface_fields_scale.F
4040       -> affects ini_foorcing.F, external_fields_load.F
4041     o Computation of surface tendencies before tendency updates.
4042       -> new: external_forcing_surf.F
4043     o Change of variable names useGMRedi, useKPP, useECCO
4044     o Further changes in dynamics.F, impldiff.F for TAMC
4045     o Tested for experiments 0, 2, 4.
4046       - not yet tested for GMRedi.
4047       - not yet tested for KPP.
4048    
4049    checkpoint30
4050     o Updates for OBCs
4051     o New experiment for test OBCs (internal_wave)
4052     o New output.txt in verification/exp4/results/
4053     o Updates for KPP: calculation of viscosity corrected, new variables
4054       kpp_dumpFreq and kpp_taveFreq
4055     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
4056       and entry for T90 in genmake
4057    
4058    checkpoint29
4059     o packaged KPP and GM/Redi
4060    
4061    checkpoint28
4062     o Corrected initialization of hFacMin for difference vertical coordinates
4063     o Modified calculation of partial cell thickness to more robust algorithm
4064     o config_summary.F: replaced write_1D_... by write_0D_...
4065       read_write.F: added subroutines write_0D_...
4066     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
4067       included some initialisations required for TAMC.
4068     o routine calc_isoslopes: modified sqrt computation to make it
4069       differentiable for zero argument.
4070     o routines dynamics, impldiff:
4071       included store directives and tape key computations required for TAMC.
4072     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
4073    
4074    checkpoint27
4075     o fixed calc_isoslopes() to so that cancellation of terms in tensor
4076       formulation works properly with variable resolution.
4077     o restructured the calling tree between the_model_main() and dynamics()
4078     o split initialise() into initialise_fixed() and initialise_varia()
4079     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
4080       in new routine ini_psurf()
4081    
4082    checkpoint26
4083     o moved some #ifdef in optional routines to encompass everything
4084       except the argument declarations. This was using up some memory.
4085     o fixed macros like _ADT to work with both versions of Linux cpp
4086     o cleaned up some unused and uninitialized variables
4087       (helps when debugging with strict compile options)
4088     o split up CPP_EEOPTIONS.h into options and macros
4089       (macros are now in eesupp/inc/CPP_EEMACROS.h)
4090     o patch for 2 processor JAM mode
4091    
4092    checkpoint25
4093     o updates for OBCs and NH
4094     o dramatically reduced memory usage
4095     o added "JAM" routines for use on Artic network
4096     o parameterization of convection by implicit vertical diffusion
4097     o added a diagnostic of convective index
4098     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
4099       (this is was partly for OBCs and NH but also in anticipation of
4100        an explicit free-surface option)
4101     o initial state input files for U and V
4102    
4103    checkpoint24
4104     o Removed some spurious "REAL"s
4105     o Updated KPP to latest version from JPL
4106     o Added a COS(latitude) in horizontal viscosity
4107    
4108    checkpoint23
4109     o Added del^4 diffusion for salt and temperature
4110     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
4111    
4112    checkpoint22
4113     o Made many small changes: implicit none, format(i5), etc...
4114     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
4115    
4116    checkpoint21
4117     o Introduced new I/O package that supports direct-access records (mdsio.F)
4118     o Split-up mid-level I/O routines
4119     o Updated input data for experiments 0,1,2,4 and 5
4120     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
4121    
4122    checkpoint20
4123     o Tidied up open-boundaries some more
4124     o Added non-hydrostatic code
4125     o Fixed some input data
4126     o Modified MPI start-up to work in "coupled" context.
4127    
4128    checkpoint19
4129     o Tidied up directory structure for verification experiments.
4130     o Added new code for open boundaries.
4131     o Corrected advective terms near boundaries.
4132     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
4133     o Implemented free-slip/no-slip BCs and del^4 dissipation.
4134     o Split default parameters out of ini_parms.F into set_defaults.F.
4135    
4136    checkpoint18
4137     o Further changes for optional code generation with
4138       CPP - ugh!
4139    
4140    checkpoint17
4141     o Beginning to incorporating modularity
4142       for supporting atmos. and ocean configs.
4143     o Small changes for TAMC complinace
4144     o New ultra simple test case. Barotropic box
4145       configuration "exp0".
4146    
4147    checkpoint16
4148     o Minor changes to exchange routines to support
4149       accumulation in reverse mode. Adjoint of an
4150       assignment is an addition.
4151     o Changes to support compilation by TAMC (LR(1)
4152       syntax) and by g77 under Linux ( 72 character
4153       limit ).
4154    
4155    checkpoint15
4156     Rewrote exchange routines to allow
4157     o General tile <-> tile connectivity.
4158     o TAMC reverse mode flag ( is this really needed? )
4159     o Variable width overlap and exchange region widths.
4160     o Hooks for sharing data via DMA, Arctic, Memory Channel,
4161       shmput/shmget, VIA, SYSV shmem and every other cool
4162       communication method.
4163    
4164    checkpoint14
4165     Consistent isomorphism chages made. These allow dynamical core
4166     to support both pressure and meters as a vertical coordinate.
4167    
4168    checkpoint13
4169     Release which corrects global_max problem and a couple
4170     of KGM time-averaging diagnostic errors. Also contains
4171     a double-gyre experiment setup as well as the baseline
4172     4 degree global template. The double gyre template is
4173     organised to allow it to be applied automatically to
4174     the baseline configuration.
4175    
4176    branch-point-rdot
4177     A few tidy-ups have been made bt the real point of this
4178     check-point (excuse the pun) is to allow a branch to be
4179     made for the purposes of adding the rDot alterations.
4180     I don't want to commit the rDot to the main-trunk until
4181     we've actually tested it...
4182    
4183    checkpoint12
4184     Tidy up and added generic genmake script (formerly
4185     configure script).
4186     Released to testers.
4187    
4188    checkpoint11
4189     Re-arranged initialise() and introduced ini_vertical_grid()
4190     and ini_masks_etc().
4191    
4192  checkpoint10  checkpoint10
4193   Introduced the configure script.   Introduced the configure script.
4194   Separated out the diags package.   Separated out the diags package.

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